A vigil is to be held in Belfast tonight to remember almost 50 people shot dead at a gay nightclub in Orlando, Florida.
A total of 49 people were killed and 53 were injured at the Pulse Nightclub in Orlando by Omar Mateen, (29) early on Sunday morning.
It is the deadliest mass shooting in American history.
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He was killed in a gun battle with a SWAT team after police used explosives and a small armoured vehicle to punch a hole in a wall and allow dozens of revellers to escape.
Orlando's Mayor Buddy Dyer said: "We will not be defined by the act of a cowardly hater."
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FBI director James Comey said Mateen had "strong indications of radicalisation" and was probably inspired by foreign terrorist organisations.
A books of condolence was opened for the victims in Belfast City Hall on Monday morning.
On Monday night Belfast City Hall was lit up in rainbow colours and at midnight changed to the US flag.
Tonight the vigil will take place at 5.30pm.