Pastor Paul Valo, from Christ Church of Orlando, tells the BBC what the church has been doing following the shootings.

The attack has added fuel to the gun control debate in the US.

But former Republican presidential candidate Marco Rubio says tougher legislation would not have prevented the mass shooting in Orlando.

He said home-grown terrorism was the hardest challenge the US faced.

The gunman was first questioned over alleged links to extremism by the FBI in 2013.

Orlando suspect Omar Mateen’s father, Seddique, says he did not see any signs in his son to worry him. He said: “If I did know, I would have stopped him.”

Officials in France have said Paris's Eiffel Tower will be lit in rainbow colours - the symbol of LGBT pride - in tribute to the victims of the Orlando killings.

France is currently hosting the Euro 2016 championships, and has lit the landmark tower in the colours of teams competing each day.

A few hours ago, filmmaker and prominent gun control advocate Michael Moore tweeted this:

As investigations continue in Orlando, security services are also looking at the case of a 20-year-old man arrested on Sunday in California with three assault rifles and chemicals used to make explosives in his car. 

James Wesley Howell told Santa Monica police he was on his way to the Pride march in LA. 

Police initially said Mr Howell had told them he planned to "harm" the rally, but they later retracted that. They also say he appears to have no link to the nightclub attack. He is in detention. 

Image source, EPA

Image source, AP

If you're just joining us, here's a recap of what we know so far:

• 50 people have been killed, 53 wounded in the deadliest mass shooting in recent US history   
• US President Barack Obama has described the attack as "an act of terror and an act of hate"
• So-called Islamic State group has said it was behind the attack, but the extent of its involvement is not clear
• The father of a gunman said he did not know that his son had "hatred in his heart"  
• We have all the latest information here
• We put together what eyewitnesses said here

• Here is our profile of the gunman, Omar Mateen  
• And here you can find details about how the attack unfolded

• The FBI says Omar Mateen, 29, the man responsible for the shooting, had pledged allegiance to Islamic State militants.
• The FBI also said he  had been interviewed three times since 2013 for inflammatory comments at work and alleged connections to a Syrian suicide bomber.
• Mateen's ex-wife, Sitora Yusufiy, described him as mentally unstable and violent but said she wasn't aware he was a religious extremist.

Image source, PA

The father of gunman Omar Mateen has put out a video statement, saying he is "grief-stricken" by the events, and never knew his son had "hatred in his heart".

He said the issue of punishing homosexuals was "not in the hands of humans".  

"My God, give the young men complete health, so they can consider the guidance for the pure faith of Islam."

Gay bars have always been a "safe space" for the LGBT community, and an attack on one "cuts to the very heart of a marginalized group’s fears", writes Daniel D'Addario in Time., external

"Sunday morning’s attack didn’t just cut short dozens of lives; it also tore a hole in the very fragile sense of security for gay people in America. What does one do when the place meant as a haven from the world’s attacks is, instead, a target?" 

Image source, AFP

Eddie Justice sent a series of terrified texts to his mother from a bathroom as the gunman made his way through gay nightclub Pulse in Orlando. 

"In club they shooting", said one text.   

His mother, Mina, shared his messages over the following day as she waited for news, but his name has now appeared on the list of those killed.  

Image source, Mina Justice showed messages sent by her son, Eddie, from inside the club

Florida's Democrat Congresswoman Lois Frankel has told the BBC she expects that Congress will "once again be silent on the issue of gun violence" after this attack.

She told Today she feels "disgust" at the lack of action from Congress on gun control.

A tribute left at a vigil in the Castro District of San Franciso. The sign reads: "Rest in peace my brothers and sisters. Here is to having the courage to be yourselves."

Image source, EPA

Sean Chagani grew up with gunman Omar Mateen, and said there had been nothing out of the ordinary about him.

He told the BBC's Today programme that he hadn't spoken to Mateen for some years, but that he'd never known him to express homophobic tendencies or react with anger. 

Image source, Omar Mateen

The shooting, and the subsequent call for blood donations, have reinvigorated calls for the US to end its restrictions on gay men giving blood. As the BBC's Aleem Maqbool tweeted, it's not the only place with such rules. 

The brutality of the Orlando attack dominates the British press on Monday morning, several of them directly linking it to the policies of the so-called Islamic State.

The Daily Mirror calls Omar Mateen an "Isis maniac", while the Telegraph says IS "wages war on gays in the West".

In the Guardian, external, Gary Younge says America's political factions will now pick through the wreckage of the heinous events" and try to portray the tragedy in a way which suits their agenda.

More victims have been named, external, taking the total to 15 of the 50 known to have died. Police are posting the names once they have spoken to next of kin. 

 The oldest victim so far is Franky Jimmy Dejesus Velasquez, who was 50.

The youngest was Luis Omar Ocasio-Capo. He was 20.

Mass shootings have become almost commonplace in the US and there is little political will to take action to control access to powerful firearms. For much of the wider world, Americans' devotion to their right to bear arms is hard to understand. 

A while back, Tyger Drew-Honey tried to work out for the BBC how gun culture became so deep-rooted in the American psyche. 

People are using several hashtags on Twitter to express pride in their gender identity and sexuality following the attacks. 

#lesbiansbreaktheinternet is trending worldwide, with many people posting selfies. 

Tiffany Johnson was inside the Pulse nightclub, and told reporters she thought at first the loud booms she was hearing were because of a problem with the stereo. 

She talked about how some people managed to escape out a back door.