That's all from BBC Africa Live today. Keep up-to-date with what's happening across the continent by listening to the Africa Today podcast or check the BBC News website.

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And we leave you with this picture of a vendor in Mauritania's largest city Nouakchott:

Alastair Leithead
BBC Africa correspondent

Image source, Reuters

Our main story today has been the Kenyan Supreme Court's explanation of its decision to annul August's presidential election.

The court blamed the country's electoral commission and its chairman for declaring Uhuru Kenyatta the winner before all the results had been verified, and said the commission’s refusal to allow the court access to its computer servers led them to believe the data could have been “interfered with”.

It was a long day of scathing testimony: explaining why the results of the presidential election were declared null and void. Kenya’s electoral commission, and its chairman were singled out for declaring Uhuru Kenyatta president when the votes had not been verified, and for failing to properly collect results from a quarter of the polling stations. Deputy chief justice Philomena Mwilu said the election was “neither transparent nor verifiable".

The re-run of the election is scheduled for the middle of next month - constitutionally it must be before the end of October. But even that now seems unlikely. The opposition says it won’t take part until the IEBC’s personnel and processes are changed.

This ruling will have repercussions for the candidates, the electoral commission, and the country, which could now be facing a constitutional crisis.

Sammy Maina
BBC Monitoring

The second of the Supreme Court judges to have dissented from the majority ruling to annul the election has been speaking.

Justice Njoki Ndung’u in her dissent said she thought part of the problem was that the country’s electoral system was both “manual” and “electronic”.

The Ugandan office of the international NGO ActionAid says police have surrounded its office and are interrogating staff.

East Africa-focused journalist Samira Sawlani says ActionAid has criticised plans to scrap the presidential age limit.

President Yoweri Museveni has been in power since the 1980s.

The government says he is 73 but the opposition has said he is lying about this and is actually five years older.

The country's age limit for the presidency is 75.

Meanwhile Ugandan media say police have banned protests scheduled for Thursday against the proposed scrapping of the age limit.

The police statement says protests are banned because of the risk of violence.

A Rwandan opposition official and eight others have been charged with forming an armed group and seeking to overthrow the government, reports Reuters news agency.

The vice president of the FDU Inkingi movement Boniface Twagirimana denied the charges in court in the capital Kigali, Reuters adds.

They could be jailed for life if found guilty of planning to overthrow the government.

Thousands of people have taken part in protests in the Togolese capital Lomé, both for and against president Faure Gnassingbé.

The opposition are calling for Mr Gnassingbé, who has been in power since 2005, to step down.

They are dissatisfied by a proposed constitutional change, to be voted on in a referendum, which would limit Mr Gnassingbé to two terms of office, but which wouldn't be applied retroactively.

The governing party, the Union for the Republic, organised a counter-demonstration to support the president.

One family has been in power in Togo for half a century.

Mr Gnassingbe took over from his father, Gnassingbé Eyadema.

Why are people marching against Faure Gnassingbé?

BBC Afrique

Image source, Getty Images

Twenty-six people have been arrested in protests against the Democratic Republic of Congo government's decision to cancel semi-biometric passports over the coming month.

The rapper Lexxus Legal and journalists were among those detained near the foreign ministry, reports say. All except one person were later freed.

The government wants all citizens to have biometric passports and says this will improve security.

But Congolese passports are among the world's most expensive, costing $185 (£135).

In April Reuters reported that $60 of the purchase price went to a company registered in the United Arab Emirates whose owner is believed to be a close relative of President Joseph Kabila.

Protesters scuffled outside Kenya's Supreme Court over the decision to annul August's presidential election and police fired tear gas to restore calm.

The court was explaining the reasons for cancelling President Uhuru Kenyatta's victory - it blamed failings at the electoral commission, saying the poll was neither transparent nor verifiable.

The ruling has raised tensions, with rival protests in support of and against the court.

BBC Afrique

Dozens of people have been killed following heavy rain in North Kivu province in eastern Democratic Republic of Congo, reports say.

At least 12 people died in flooding in Bihambwe in the south of the province.

"A hundred people are missing, 12 bodies taken from the water and seven people have been rescued," said provincial spokeswoman Marie Shematsi.

About 20 people drowned in the Beni area further north. They were fleeing clashes between the army and militants and were trying to cross a river when they died.

Ethiopian artistLemma Guya has told the BBC he has painted more than 10,000 paintings, within seven decades. The 90-year old from the Oromia region is particularly famed for his creations on animal skin.

He often uses goat hide or ox skin as a canvas:

Image source, Lemma Guya

Guya told to the BBC's Habtamu Tibebu that this painting shows Odaa - the tree which symbolises Oromo identity and where important discussions and cultural events take place.

The woman in the centre of the picutre holding grass in her hand is Hadha Nabso who lived in Bishoftu up to 1996 and died at the age of 120.

See more of Guya's paintings on the BBC's new Afaan Oromoo website.

Image source, AFP/Getty

Nigerian President Muhammadu Buhari has compared the violence against Rohingya Muslims in Myanmar to the abuses and genocide in Bosnia and Rwanda.

Speaking at the UN in New York, he called for an end to "ongoing ethnic cleansing" and said refugees needed to return home safely.

"The Myanmar crisis is very reminiscent of what happened in Bosnia in 1995 and in Rwanda in 1994," Mr Buhari said.

The "horrendous suffering" had been caused by a "state-backed program of brutal depopulation of the Rohingya-inhabited areas in Myanmar on the bases of ethnicity and religion", he said.

Watch:Tracing a family who fled their Rohingya home

Members of the Kenyan legal community have been waging war on social media as the Supreme Court judges explained their decision to annul the election.

Lawyer Donald Kipkorir said lawyers for President Kenyatta were "cheap" for tweeting their disdain for the ruling.

But Mr Kenyatta's lawyer Ahmednasir Abdullahi hit back, saying the case was "way above Mr Kipkorir's level".

A furious Mr Kipkorir raged that he had "done more constitutional cases" than him and told Mr Abdullahi to look up his contribution.

Image source, Getty Images

Nine elephants have been electrocuted in central Botswana after they knocked down overhead power lines while drinking from a leaking pipe, Reuters news agency reports.

The elephants were all attempting to reach the leaking pipe supplying water to residents of the village of Dukwi when the accident happened, the director of Wildlife and National Parks, Otisitswe Tiroyamodimo, said to Reuters.

“Investigations are still at a preliminary stage, but what we have discovered so far is that the elephants were helping themselves to water from a damaged supply pipe. The elephants were electrocuted when they knocked down power lines, which fell into the gushing pool of water,” he said.

There are between 150,000 and 200,000 elephants in Botswana.

Watch the highlights of the judges' explanation from earlier today on why they annulled the Kenyan election:

Earlier, Justice Jackton Ojwang gave the reasons why he did not agree with the Kenyan Supreme Court's decision to cancel the election because of irregularities.

He spoke for well over an hour, prompting people to post expressions of exhaustion on social media.

Someone has now posted a picture of what appears to be the judge's thesis - a weighty document - captioning the post: "The guy does not do things in summary."

Judge Ojwang's position is that the irregularities did not affect the overall election result.

BBC Monitoring
The world through its media

Two UN camps in the northern Malian town of Kidal have been attacked using rockets - with reports suggesting it could be revenge for the lack of a visa for a local militant leader to attend the UN General Assembly in New York.

No casualties were reported but there was significant material damage in the camp, the Journal du Mali website said.

It quoted a source close to the Islamic Movement of the Azawad group (MIA) as saying the attack could have occurred because the US had denied MIA leader Alghabass Ag Intalla a visa to attend this week's UN General Assembly.

The attack against the two camps, under Guinean and Chadian command respectively, was described by a Kidal resident as "more violent than previous attacks".

The resident went on to say that the Chadians resisted the attackers by holding on to their positions.

Kenya Deputy President William Ruto has tweeted his displeasure at the Supreme Court's explanation of its decision to annul the result of last month's election.

Mr Ruto described the decision as a "supreme coup" based on "technicalities".

Dickens Olewe
BBC Africa

Image source, AFP

When Kenya's chief justice David Maraga annulled Kenya's election he had said that the judges had found "irregularities and illegalities" in the conduct of the election.

Today's detailed ruling fleshed out those weighty allegations.

The court accused the the Independent Electoral and Boundaries Commission (IEBC) of failing to follow the law and being duplicitous in its conduct.

The accusation comes as the IEBC is suffering from a crisis of confidence.

The court has essentially given the opposition extra ammunition for its push to get IEBC officials sacked and push for changes in the voting systems ahead of the re-run.

The judges have also effectively called out the company that printed the ballot papers, by agreeing with the opposition that some did not have the required security features.

Opposition coalition Nasa wants the IEBC to find another firm to print the ballot papers for the re-run.

This means that IEBC head Wafula Chebukati is coming under huge pressure to change his team and prepare for a new election, which is increasingly looking like an impossible task.

President Uhuru Kenyatta and his deputy Uhuru Ruto, who have not relented in their criticism of the judges, were also rebuked.

The president had called Mr Maraga a crook and threatened to deal with him after the re-run.

Mr Maraga responded to the threat in an unflinching way. He said he would stand up for the rule of law despite the "intimidation".

Is’haq Khalid
BBC Africa, Abuja

The Nigerian Air Force has deployed aircraft to the country's south-east to support the army in its so-called Operation Python Dance in the region.

The military says the operation is aimed at combating kidnapping and other criminal activity, but troops engaged in several deadly clashes with separatists in the area last week, resulting in widespread tension across the country.

The air force has now joined in the operation to provide air cover to ground troops.

The leader of the Pro-Biafran secessionist movement, Nnamdi Kanu, has not been seen since the military raided his house last week in the city of Umuahia.

The Nigerian army had labelled the separatist group, the Indigenous People of Biafra (IPOB), a terrorist organisation, but later retracted the statement.

We reported earlier that there has been a rare sighting of a leopard in Nigeria's Yankari reserve.

The Wildlife Conservation Society (WCS) had tweeted a fleeting picture of the leopard's behind.

But now, they tweet excitedly, they have found a picture of the face as well: