Florida Governor: A moment of silencepublished at 20:42 British Summer Time 12 June 2016
Florida Governor Rick Scott has called for a nationwide moment of silence at 18:00 (22:00 GMT).
Image source, APSummary
Forty-nine people killed in attack on gay nightclub - the worst mass shooting in recent US history
Suspect took hostages and died in gunfight with Swat officers
He is named as 29-year-old Omar Mateen, US national
Mateen investigated twice by FBI since 2013, but was not on active terrorism watch list
US President Obama says no evidence he was part of a larger plot
Florida Governor: A moment of silencepublished at 20:42 British Summer Time 12 June 2016
Image source, APMore from the FBI: 911 callpublished at 20:34 British Summer Time 12 June 2016
The FBI spokesman confirmed Mateen made a call to emergency services - 911 in the US - before the shooting but would not discuss the contents of the call.
FBI: Mateen purchased guns in past few dayspublished at 20:27 British Summer Time 12 June 2016
Mateen purchased multiple guns in the past few days, the FBI spokesman said.
When asked why Mateen was able to purchase a gun given the fact he was on the FBI radar for terror links, the spokesman answer he was able to do so because the investigations were closed.
FBI interviewed gunman in 2013 and 2014published at 20:23 British Summer Time 12 June 2016
BreakingIn a press conference, an FBI spokesman says the agency first interviewed Omar Mateen in 2013 after he made "inflammatory remarks" to a colleague. The investigation was closed.
He added that the FBI had interviewed Mateen again in 2014 about a potential connection with suicide bomber Moner Abu Salha.
The FBI investigation found no "substantial relationship" between Mateen and Salah.
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End of twitter postSome victims still in a critical conditionpublished at 20:00 British Summer Time 12 June 2016
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End of twitter post 2Other Pride celebrations pay tributepublished at 19:51 British Summer Time 12 June 2016
Austin Ellis, a member of Metropolitan Community Church, carries a cross with a sign in memory of the victims of the Pulse nightclub shooting in the Philadelphia Pride parade this afternoon.
How IS claim responsibility for solo attackspublished at 19:50 British Summer Time 12 June 2016
Omar Mateen called the emergency services before the attack and swore allegiance to the so-called Islamic State militant group, unnamed officials are telling US media.
It's not clear yet what links, if any, he had to the group.
New York Times reporter Rukmini Callimachi, who has reported extensively on the Islamic State group, offers her insights into why IS claim credit for so-called lone wolf attacks.
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End of twitter post 2IS claims Orlando attackpublished at 19:38 British Summer Time 12 June 2016
The news agency of the so-called Islamic State, Amaq, claims IS "fighter" carried out the Orlando shooting, BBC Monitoring's Mina al-Lami reports.
In his earlier statement, President Obama said the US was still investigating any "sympathies" or "associations" the suspect may had had.
It is unclear if the killer had any direct links to the group.
BBC security correspondent Gordon Corera says the statement does not prove that IS ordered the attack.
Blood banks at capacitypublished at 19:19 British Summer Time 12 June 2016
OneBlood donation center announced it was at full capacity for donations and has urged people to return in the coming days, according to a statement, external.
To make an appointment, donors can call 1-888-9-DONATE.
Images show hundreds of Florida residents in long queues as they wait to donate blood and help in the worst mass shooting in recent US history.
Gay people in the US are banned from giving blood if they have sex in the last year, but that ban has temporarily been lifted in the Orlando area.
Image source, Bob Self/The Florida Times-Union via AP
Image source, Loren Elliott/Tampa Bay Times via AP
Image source, Loren Elliott/Tampa Bay Times via AP
Image source, Zack Wittman/Tampa Bay Times via APObama: Attack on LGBT community is an attack on us allpublished at 19:09 British Summer Time 12 June 2016
President Barack Obama said gay nightclubs like Pulse are "more than a nightclub" because they are also "a place of solidarity" for LGBT Americans.
He said it was a "sobering reminder" that an attack on any American is an attack "on all of us".
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End of twitter postObama - This is an act of terrorpublished at 19:03 British Summer Time 12 June 2016
BreakingPresident Barack Obama, speaking at the White House, calls the attack an "act of terror" and an "act of hate".
Garcetti: We are all marching togetherpublished at 19:00 British Summer Time 12 June 2016
"Our hearts are in Orlando today," the Los Angeles mayor says as the city's Pride Parade starts.
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End of twitter postPulse nightclub asks for helppublished at 18:06
Pulse nightclub is back tweeting after the attacks. It used its Facebook page during the shooting, telling people to get out of the nightclub and "keep running".
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End of twitter postLA Mayor: 'Heavily armed' man arrested before going to LA Pride Paradepublished at 18:45 British Summer Time 12 June 2016
Mayor Eric Garcetti confirmed the LA Times, external report that a man with weapons and possible explosives had been arrested last night who said he was going to the city's Pride parade.
Garcetti said they believed the arrest was "completely unrelated" to the Orlando shooting.
Police at Mateen's housepublished at 18:41
Image source, Getty ImagesImage caption, Police search for explosives in the house where Omar Mateen is believed to have lived
Suspected shooter 'pledged allegiance to Islamic State'published at 18:37 British Summer Time 12 June 2016
NBC News is quoting sources as saying that the suspected attacker called 911 moments before shooting and pledged allegiance to leader of the so-called Islamic State.
Pope Francis: 'Homicidal folly'published at 18:31
Pope Francis has expressed deep "horror and condemnation" of "homicidal folly" in the Orlando shooting.
More pictures of suspect emergepublished at 18:25 British Summer Time 12 June 2016
More pictures are now emerging of the suspected attacker.
Image source, CBSImage caption, In this one, the man - named as Omar Mateen - is taking a selfie. He is wearing a New York Police Department jumper
Image source, CBSImage caption, Here, the suspect - who has a different haircut - just smiles on camera
Image source, CBSImage caption, Yet another selfie of Omar Mateen. And again he wears a NYPD shirt
Reactions to the shootingpublished at 18:23
US lawmakers and global figures have taken to Twitter to share their reaction to the mass shooting in Orlando.
US Senate Majority Leader Mitch McConnell tweeted: "The nation's prayers are with the victims and families in the wake of this terrible tragedy."
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End of twitter postLondon Mayor Sadiq Khan also shared his support on social media, adding he stood with Orlando.
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End of twitter post 2Turkey's Deputy Prime Minister Mehmet Simsek also condemned the attack.
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End of twitter post 3Florida Senator Bill Nelson released a statement on the shooting, adding that authorities have told him that there appeared to be a link to Islamic State.
“Our thoughts and prayers go out to the families of all the victims of this horrific attack in Orlando. I have spoken with the FBI and there appears to be a link to Islamic radicalism. I have conferred with additional sources and they think there is likely a connection with ISIS (Islamic State)," Sen Nelson said.
"So as we all mourn the senseless loss of life and investigators continue to learn more, we must remain vigilant and remember that if you see something, say something.”
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End of twitter post 4Beefed up security at LGBT festivalpublished at 18:11
Security is being beefed up for a LGBT festival in Washington DC, after the Orlando attack.
DC Mayor Muriel Bowser said in a statement that she has been briefed by police chief Cathy Lanier about increased security measures ahead of Sunday's Capital Pride Festival.
Bowser said Washingtonians "will not be deterred by hate as we gather to celebrate love".