A vigil has taken place at Belfast City Hall to remember the 49 people shot dead at a gay nightclub in Orlando, Florida.
The incident has been described as the worst mass shooting in recent US history.
50 killed in gay nightclub in worst mass shooting in US history
Shooter Omar Mateen opened fire in the packed club in the early hours of Sunday morning, leaving 49 dead and dozens wounded.
Police shot the 29-year-old dead after he barricaded himself in a bathroom, taking several people hostage.
US President Obama said the inquiry was being treated as a terrorist investigation, but added there was no clear evidence that Omar Mateen was directed by IS.
Orlando massacre: Lord Mayor leads tribute to shooting victims
Belfast Lord Mayor Brian Kingston led tributes locally signing a book of condolences at City Hall.
A vigil took place in Londonderry on Monday evening and on Tuesday scores turned out to Belfast City Hall to show solidarity with Orlando.