ISIS has claimed responsibility for the Las Vegas attack last night, saying the shooter converted to Islam months ago, but has provided no evidence.
The group has claimed responsibility for the mass shooting in Las Vegas, saying that the perpetrator was "a soldier".
The group released two statements on its Aamaq news agency hours after the shooting at a country music concert that killed 58 people and wounded 515.
It did not name the suspected shooter, identified by Las Vegas police as 64-year-old Stephen Paddock, but said he had "executed the operation in response to calls to target countries of the coalition" batting the extremist group in Iraq and Syria.
ISIS often claims attacks by individuals inspired by its message but with no known links to the group.
The FBI says the shooter who killed 58 people and injured more than 500 others at a Las Vegas concert had no connection to an international terrorist group.
Authorities say 64-year-old Stephen Craig Paddock killed himself after the shooting.
Police have not yet determined a motive.
They are however looking for a woman who was a companion of the Las Vegas shooter is considered a person of interest and is out of the country.
Sheriff Joe Lombardo didn't release further details overnight about the woman but said authorities would try to speak with her when she got back to the United States.
Looking for loved ones amongst the chaos
Las Vegas authorities are calling for blood donations and setting up a hotline to report missing people in the wake of the mass shooting.
Las Vegas police said that it will take time to identify all of the injured and dead in what was the deadliest mass shooting in US history.
Police have opened a hotline to report missing people.
Police have also opened a "family reunification centre" for people to find loved ones.
Las Vegas police say anyone who wants to help can give blood at one of two locations in Las Vegas and nearby Henderson.
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