Isis Claims Orlando nightclub Shooting...

Islamic State has claimed responsibility for the Orlando nightclub shooting,which killed 50 people and injured 53 others, according to the Amaq news agency, which is tied to the group.

They are calling it the deadliest attack in mass shooting US history, eclipsing the 2007 Virginia Tech massacre which left 32 people dead.

The Islamic State claim comes after US media reported that a man, suspected to have been the gunman, swore allegiance to IS in a 911 call around the time of the attack.

He also reportedly mentioned the 2013 Boston Marathon bombings, according to CNN.

The gunman, who is among the dead, has been named as 29-year-old Omar Mateen of Port St. Lucie Florida, a US citizen of Afghan descent.

Armed with a device thought to be a bomb, an assault rifle and a handgun, Mateen opened fire in the busy club Pulse in the early hours of Sunday morning before taking hostages.

He was involved in a three-hour stand-off with officers before SWAT teams stormed the building and shot him dead.

The attack unfolded just after 2am when an officer working as a security guard at the club raised the alarm and engaged in a gun battle with Mateen. The gunman then took a number of hostages inside the popular gay club.

Some clubbers mistook the sound of gunshots for music and the bar posted on its Facebook account: 

"Everyone get out of pulse and keep running."

 At 5am police launched a mission to rescue the hostages and nine officers stormed the club, shooting dead the attacker following a short gunfight.

One officer was shot in the head but his Kevlar helmet saved his life.

Hundreds of people have lined up outside health centres to give blood to help the victims.

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