Democratic White House challenger Joe Biden warned in his final debate with Donald Trump on Thursday any country that interferes in the US election "will pay a price" if he is elected.
"I made it clear that any country, no matter who it is, if it interferes with American elections will pay a price. They will pay a price," Biden said.
A day before the debate, US authorities had warned that Russia and Iran took steps to influence public opinion ahead of the November 3 vote.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)