Image source, Reuters

For those just joining us, here are the main things to know:

• Russian President Vladimir Putin has survived the immediate threat to his power after the leader of the Wagner mercenary group agreed to end his mutiny against the Russian army
• Yevgeny Prigozhin - pictured above - called off his Wagner troops' march to Moscow late Saturday night after negotiations with Putin's ally and Belarus' leader Alexander Lukashenko
• He also agreed to leave Russia for Belarus, and the Kremlin has said it will not pursue punishment against him or Wagner fighters
• The deal de-escalates a huge security crisis for Russia
• Putin had even warned of civil war on Saturday in a national address, blasting Prigozhin's actions as "betrayal" and "treason"
• But by Sunday morning, Wagner troops had pulled out of Rostov-on-Don, the southern military command they had captured on Saturday
• Ukrainian President Zelensky says the revolt has revealed "complete chaos" in Russia and that "the bosses of Russia do not control anything"
• US, UK, and EU leaders say they're monitoring the situation closely
• Washington was reportedly briefed of the rebellion plans as early as Wednesday, US media is reporting

US president Joe Biden has so far remained silent on events in Russia.

The White House had said earlier on Saturday that President Biden and Vice President Kamala Harris are being briefed by senior national security advisors throughout the day.

We were also told that Biden consulted with top advisers and also spoke with the leaders of Britain, France and Germany.

US media later reported that he had delayed a scheduled trip to Camp David to attend a video briefing with top security advisers - and that national security adviser Jake Sullivan cancelled a planned trip to Europe so he could accompany Biden to Camp David.

It was also reported that the Joint Chiefs of Staff General Mark A Milley cancelled an official trip to monitor the situation in Russia.

Simon Jones
Reporting from Westminster

The official line from the Foreign Office is that it's monitoring the situation in Russia closely.

Foreign Secretary James Cleverly held an emergency meeting known as COBR on Saturday to analyse the situation and review the safety of British citizens in Russia.

Both Cleverly and UK PM Rishi Sunak have also held talks with other G7 leaders. We know Rishi Sunak spoke to the US president, French president and the German chancellor.

One key theme emerging from those meetings is the ongoing support towards Ukraine and its people.

In terms of what happens next - officials will be watching Putin's actions very closely. What we do know is that when Putin's authority is challenged - and some say he was humiliated by yesterday's actions - he does have a tendancy to lash out.

So there will be some concern in places like the Foreign Office that the Russian leader could seek to exact some sort of revenge on Ukraine.

The head of the Ukrainian fighting force in the region said Russia had shelled part of Nikopol overnight. The city lies opposite the Zaporizhzhia nuclear plant now controlled by Russians.

A Ukrainian counter-offensive is currently under way in the region.

"Another night of war... another night that was not without casualties," said the region's commander on Telegram.

He said a 47-year-old man was wounded by shrapnel, and three homes and a gas pipeline were damaged.

Steve Rosenberg
BBC Russia editor

It was an astonishing 24 hours in which Vladimir Putin faced the greatest challenge to his authority since coming to power more than two decades ago.

The mutiny is over – after a deal between the Kremlin and the Wagner mercenary group. Wagner fighters can return to base and won’t be prosecuted, but their leader Yevgeny Prigozhin must leave Russia and move to Belarus.

As for President Putin, he does not emerge from these events looking particularly strong.

Look what happened in Rostov – Wagner, a private army, had been able to seize control of military facilities in a major Russian city with apparent ease, then push north towards Moscow.

And the man behind the rebellion, Prigozhin, is a free man. Despite the fact that he tried to topple the military leadership of Russia, the charge against him of armed mutiny has been dropped.

Abdujalil Abdurasulov
Reporting from Kyiv, Ukraine

Image source, EPA

We know that as a result of the negotiations that lasted for the whole day, Yevegeny Prigozhin agreed to de-escalate by night time.

Belaras' strongman leader Aleksander Lukashenko - a close Putin ally - was the one who conducted talks with Prigozhin on Saturday.

As part of the deal, Prigozhin has been been allowed to go to Belarus and the Kremlin has said it will drop all charges against him.

The negotiations took place with Putin’s agreement, Lukashenko’s press service said.

As part of the agreement, the Kremlin agreed to drop prosecution against the Wagner group leader and also gave Wagner fighters security guarantees.

What else was offered to Prigozhin and mercenaries is not yet clear.

Russia has been using the territory of Belarus to launch attacks on Ukraine since the beginning of the invasion, effectively erasing Belarus’ sovereignty.

Any signs showing Putin’s weakened grip on power threatened Lukasenko's regime in Minsk, which is heavily dependent on Moscow.

Yevgeny Prigozhin's mutiny may have fizzled out, but the Kremlin now faces a "deeply unstable" situation, according to Washington-based think tank Institute for the Study of War (ISW).

The failed rebellion and the "short-term fix" - in the form of an apparent truce with the Wagner Group - will likely "substantially damage" Putin’s government and the Russian war effort in Ukraine, ISW analysts write, external.

"The rebellion exposed the weakness of the Russian security forces and demonstrated Putin’s inability to use his forces in a timely manner to repel an internal threat and further eroded his monopoly on force," they said.

The authors also noted that Wagner fighters were - in some cases - greeted warmly by residents in Rostov-on-Don.

We reported earlier that road restrictions had been lifted in Rostov and Lipetsk- some of the affected regions on the highway leading to Moscow which Wagner fighters had been travelling down on Saturday.

Now Russian state media agency TASS is reporting that highway restrictions remain in place further north in the Moscow and Tula regions. Tula is just to the right of Kaluga, which is marked on the map below.

A long-time ally of President Putin has slammed the "arrogance" of the rebellion leader Yevgeny Prigozhin, saying it could lead to "dangerous consequences".

Posting on Telegram after the Wagner leader withdrew, Chechen leader Ramzan Kadyrov also claimed that Prigozhin had acted out of "anger" over a chain of unsuccessful business deals.

Kadyrov, the leader of the southern Russian republic, said he had earlier even advised the leader of the Wagner group to set aside his issues.

"I talked with Prigozhin, urging him to leave his business ambitions and not mix them with matters of national importance. I thought that he heard me, but it turns out that this anger in him has only grown all this time."

Kadyrov called on all mercenaries to be "sober" in their decisions - otherwise it could lead to "disastrous results" he warned.

Image source, EPA

It's now early Sunday in Russia. Alongside reports that Wagner forces have left the southern city of Rostov-on-Don, local media is also reporting that road restrictions have been lifted.

Earlier, when Wagner mercenaries were making their way north to Moscow from Rostov, Russian authorities had shut down roads in an attempt to halt their march.

Now the state-run TASS media says all road restrictions have been lifted in Rostov, Lipetsk and other regions affected during the standoff.

Image source, Reuters

It's morning in Moscow where residents are still likely getting to grips with the dramatic events they've seen since Friday night.

The immediate threat to those in charge in Moscow - of a mercenaries-led rebellion - has passed.

Several people the BBC spoke to in the Russian capital on Saturday said they weren't too worried about the Wagner fighters, who, at the time, had been making their way to Moscow.

One Muscovite told our Russia editor Steve Rosenberg that they had "not seen any tanks yet so we won't worry about it".

Another told him they had survived tanks on the streets of Moscow in 1991 as the Soviet Union fell, and in 1993 during the constitutional crisis, so "we'll survive whatever comes today".

A woman named Galina told Reuters: "It doesn't frighten me at all. I have confidence in our president and our people."

But another resident Nikolai had called the events "frightening". He told Reuters: "It's disturbing, both for you and your loved ones."

As we know now, the threat of an advance into Moscow has passed but security remains tight, and the order for residents to stay home and not go to work on Monday is still in place.

Steve Rosenberg
BBC Russia editor in Moscow

The Wagner rebellion has been a watershed moment, a very dangerous moment for Vladimir Putin.

When you've been in power that long you think you're invincible, you can survive anything.

Sixteen months ago, Putin launched his "special military operation" in Ukraine to "make Russia safer".

But in recent months there have been drone attacks on the Kremlin and shelling in Western Russia.

And now: an armed rebellion of mercenaries who had been making their way to Moscow, demanding the removal of a defence minister appointed by Vladimir Putin, before they decided to withdraw.

US security officials were warned as early as Wednesday that Prigozhin was preparing to act, reports The New York Times citing intelligence sources.

Their immediate concern had been how it would affect Moscow's control of its nuclear weapons arsenal.

US intelligence had been tracking the rising tensions between the Wagner chief and Russia's war leaders - including Defence Minister Sergei Shoigu - for months.

A clip circulating on Twitter, external - that has been substantiated by BBC Verify - shows a Wagner fighter firing his rifle into the sky as he and other Wagner Group mercenaries withdraw from Rostov.

Civilians lining the streets can be heard applauding and cheering on the fighters. We've seen a lot of footage of public support for the mercenary group in the southern city these past hours.

Image source, TWITTER

Our colleagues at BBC Russian are reporting that an explosion has been heard in the southeast Ukrainian city of Zaporizhzhia, citing the public broadcaster Suspilne.

An air raid alert has apparently been declared in the city and the region.

Zaporizhzhia is the site of the largest nuclear power plant in Europe, that was captured by the Russians last May after fierce fighting.

Ukraine's counter-offensive is currently under way in the Zaporizhzhia region.

On Friday, Ukrainian President Volodymyr Zelensky accused Russia of plotting a "terror" attack on the plant, which Moscow has denied.

Paul Kirby
Europe digital editor

For one long June night and a day, Russia's notorious mercenary leader Yevgeny Prigozhin staged an apparent insurrection, sending an armoured convoy towards Moscow and raising questions about Vladimir Putin's grip on power.

But by the end of Saturday, Prigozhin had called the whole thing off and ordered his men back to base.

For months he has played a vital role in Russia's military campaign in Ukraine, recruiting thousands to his Wagner mercenary group, especially from Russian jails.

He has long been in a public feud with the military chiefs running the war, but that turned into open revolt as they sought to bring his forces under their command structure by 1 July.

Prigozhin was adamant this was "a march for justice", not a coup. Whatever it was, it came to an end very fast.

Twenty-four hours of mayhem, and so much we don't know.

Read the rest of the analysis here.

Image source, Reuters

The EU, the US and allies are paying very close attention to Russia after this incredibly chaotic 24 hours.

The Pentagon issued a statement earlier, saying Secretary of Defense Lloyd J Austin had spoken in the past hours with defence ministers from Canada, France, Germany, Poland and the United Kingdom to discuss the situation.

"The United States will stay in close coordination with allies and partners as the situation continues to develop," the statement said.

Secretary Austin also said that the support from the US for Ukraine would not change.

Meanwhile, Canadian PM Justin Trudeau met with senior government officials on Saturday to discuss the unfolding situation in Russia, his office said.

Image source, Reuters

The band of mercenaries known as the Wagner Group are withdrawing and returning to their bases after leader Yevgeny Prigozhin called off his rebellion against the Russian army.

What do we know about them?

The Wagner Group (officially called PMC Wagner) describes itself as a "private military company".

It was first identified in 2014, when it was backing pro-Russian separatist forces in eastern Ukraine.

Since then, it has grown considerably and has played a leading part in Russia's attacks in Ukraine.

The UK's Ministry of Defence says Wagner started recruiting in large numbers in 2022 because Russia had trouble finding people for its regular army.

About 80% of Wagner's troops in Ukraine have been drawn from prisons, the US National Security Council said at the start of this year.

In Ukraine, Wagner troops played a major part in the costly, 11-months long fight to take the city of Bakhmut from Ukrainian forces.

• Read more about the Wagner Group here.

Watch footage confirmed by BBC Verify of the Wagner leader leaving the southern city he and his forces took control of yesterday.

In just over a day, events escalated and then de-escalated quickly as Wagner mercenaries launched a rebellion and then swiftly halted it. Here's a quick look at how events unfolded:

Friday

• Wagner boss Yevgeny Prigozhin launches a rant blaming Russian Defence Minister Sergei Shoigu for the war in Ukraine, claiming he did it to gain military honours
• Prigozhin later vows to "march for justice" and accuses the Kremlin of hitting his troops with a missile strike on Friday
• Security is stepped up in Moscow late on Friday after Prigozhin called for an armed rebellion

Saturday

• Prigozhin declares 25,000 of his troops have crossed the border from Ukraine in the early hours of the morning
• Moscow's mayor announces anti-terrorist measures are being taken to reinforce security and in Rostov-on-Don, close to the Ukraine border, residents are told to stay inside
• Shortly before 06:00 BST video appears online showing Prigozhin inside Russia's southern military headquarters

• Russian President Vladimir Putin denounces the "criminal adventure" and warns of punishments in a TV address at around 08:00
• Over the course of the day, Wagner forces make progress up the M4 motorway towards Moscow, including seizing military facilities in Voronezh
• Just before 18:30, Prigozhin says on his Telegram channel that he has agreed to "stop" the movement of his troops
• Belarus reveals its leader, Alexander Lukashenko, had been holding talks with Prigozhin and Putin had agreed to the conversation
• At around 21:00 Russian state media reports that Prigozhin will leave for Belarus, and that criminal charges against him and his troops will be dropped