The tragedy that took place over the weekend has been described as the "deadliest single US mass shooting incident" after an American man went on a shooting rampage at a gay night club in the state of Florida.
Omar Mateen shot dead 50 people and wounded at least 53 more during the massacre at the Pulse nightclub in Orlando in the early hours of Sunday morning – and called 911 just before the attack to pledge allegiance to ISIS.
Mateen, who worked as a security guard, was inspired by the terror group and has been investigated by the FBI twice over his suspected terror links. He also attended the same Mosque as an American suicide bomber.
Donald Trump called for President Barack Obama to resign after he did not blame radical Islam for the attack in his remarks following the shooting, referring to it instead as an 'act of terror' and an 'act of hate.'
Mateen, who has a wife and young son, has been described as a 'mentally ill' loner who beat his ex-wife for not completing household chores and became enraged when he saw two men kissing months before launching his attack.
See pictures of some of the victims who lost their lives in the shooting.