DONALD Trump has called the mass Las Vegas shooting "an act of pure evil" in his first national address following the massacre.

"My fellow Americans, we are joined together today in sadness, shock and grief," he said from the White House on Monday.
 

Mr Trump said Americans would come together in the wake of the unprecedented carnage.

"In moments of tragedy and horror, America comes together as one. And it always has. We call upon the bonds that unite us, our faith, our family, and our shared values," he said.

"We call upon the bonds of citizenship, the ties of community, and the comfort of our common humanity. Our unity cannot be shattered by evil, our bonds cannot be broken by violence, and though we feel such great anger, at the senseless murder of our fellow citizens, it is our love that defines us today."

Mr Trump offered prayers for the wounded and praise for law enforcement officers.

"To the wounded who are now recovering in hospitals, we are praying for your full and speedy recovery," he said.

The Republican leader said he and wife Melania hope for the day when "evil is banished and the innocent are safe from hatred and fear."

He said he would visit with the families of the victims, first responders and leaders in Las Vegas on Wednesday. He also said flags would be flown at half-staff "in memory of the fallen".

Stephen Paddock, 64, opened fire on a country music concert killed more than 50 people and wounded more than 500 about 10pm Sunday local time.

The US Homeland Security Department said there was no "specific credible threat" involving other public venues, with the gunman's motive under investigation.
 

US LEADERS TWEET AFTER MASSACRE

Four hours after the massacre, Mr Trump tweeted his sympathies to Las Vegas shooting victims and their families.
"My warmest condolences and sympathies to the victims and families of the terrible Las Vegas shooting. God bless you!" he wrote.

White House spokeswoman Sarah Huckabee Sanders said Mr Trump was "briefed on the horrific tragedy in Las Vegas."

She said that "we are monitoring the situation closely and offer our full support to state and local officials. All of those affected are in our thoughts and prayers."

Former president Bill Clinton tweeted: "Thinking of the victims and responders in Las Vegas. This should be unimaginable in America."

His wife and former Trump rival Hillary Clinton posted a series of tweets criticising US gun laws and the agenda of the National Rifle Association in the US.