The terror attack at a gay nightclub in Orlando in Florida that killed 50 people and injured another 53 people, has been labelled as the worst incident of mass shooting in US history.
The shooter, identified as 29-year-old Omar Mateen, an Afghan-origin man, pledged allegiance to ISIS in a phone call to emergency number 911 during the attack.
Mateen, a security guard born to Afghan parents in New York, called 911 after his initial assault at the dance club to pledge allegiance to the leader of the Islamic State, Abu Bakr al-Baghdadi, said media reports quoting law enforcement officials.
Officials also said Matten gave his full name in the phone call.
Reports say, he also mentioned the Boston bombers — Tsarnaev brothers, who carried out the Boston Marathon bombings in 2013, during the call.
Mateen carried an assault rifle and a pistol into the gay club in Orlando to carry out the carnage. He was later shot dead by the police.
Officials are still trying to find out the motives behind the attack.
While ISIS took credit for the attack, the FBI is yet to find evidence that corroborates the claim.
US President Barack Obama described the massacre as an act of terror and hate.
“This is a heart breaking day for gays and lesbian’s community…Today marks the deadliest shooting in American history,” Obama said in his address to the nation after the mass shooting.
H also spoke about the controversial gun laws of the country that gives easy access to firearms to its citizens.
Americans have to decide if having easy access to firearms is “the kind of country we want to be,” the President said.
According to the police, Mateen was previously under FBI radar. FBI had interviewed him in 2013 and 2014. But at that time the FBI did not find anything against him.
“Those interviews turned out to be inconclusive, so there was nothing to keep the investigation going,” FBI Assistant Special Agent Ronald Hopper was quoted as saying.
Since 2007, Mateen had worked as a security officer at G4S Secure Solutions, which is said to be one of the world’s largest private security companies.
Meanwhile, the political blame game has begun.
“Appreciate the congrats for being right on radical Islamic terrorism, I don’t want congrats, I want toughness and vigilance. We must be smart!” Presumptive Republican presidential nominee Donald Trump tweeted.
He also called for a resignation from President Obama.
“Is President Obama going to finally mention the words radical Islamic terrorism? If he doesn’t he should immediately resign in disgrace!” Trump said in a series of tweets.
“If we do not get tough and smart real fast, we are not going to have a country anymore. Because our leaders are weak, I said this was going to happen and it is only going to get worse. I am trying to save lives and prevent the next terrorist attack. We can’t afford to be politically correct anymore,” Trump added.
Trump, during his campaign, had called for a ban on Muslims from entering the United States.
(With inputs from agencies)