The danger from terrorists attempting to dispatch an atomic assault that would "change our reality" is genuine, President Barack Obama has said.

The world has taken "solid" strides to anticipate atomic terrorism, he told the Nuclear Security Summit in Washington.

Be that as it may, the alleged Islamic State (IS) getting an atomic weapon is "one of the best dangers to worldwide security," he included.

More than 50 countries are spoken to at the summit.

IS has officially utilized compound weapons as a part of Syria.

"There is most likely if these maniacs ever got their hands on an atomic bomb or atomic material, they would absolutely utilize it to slaughter whatever number individuals as could reasonably be expected," he said.

"The absolute best resistance against atomic terrorism is completely securing this material so it doesn't fall into the wrong submits the primary spot."

He said the world can't be "self-satisfied" and should expand on its encouraging in abating the stockpiling of atomic weapons.