58 people have been killed and more than 500 people taken to hospital in the deadliest mass shooting in US history.
A man opened fire on concert goers from the 32nd floor of the Mandalay Bay Hotel and Casino in Las Vegas.
Police believe the suspect killed himself as Swat teams used explosives to get into his room - he has been named as local resident 64 year old Stephen Paddock.
They say he had over 10 guns in his hotel room while the US Homeland Security says there's no 'specific credible threat' to other public venues.
An area on the city's famous main strip has been sealed off - while flights in and out of McCarran Airport in Las Vegas have been temporarily halted.
The Irish Consulate for the west of the US says they're aware of the situation and are advising Irish people in the area to follow the instructions of local police.