India, May 26 -- After Russia launched a fresh offensive against Ukraine following the prisoner swap by hitting the country with a record number of drones and killing 13 people, United States President Donald Trump on Monday said he is "not happy" with his Russian counterpart, Vladimir Putin.

"I'm not happy with what Putin is doing. He's killing a lot of people, and I don't know what the hell happened to Putin," said Trump at Morristown airport.

"I've known him a long time, always gotten along with him, but he's sending rockets into cities and killing people, and I don't like it at all," he added.

Trump's remarks come after Russia launched its biggest aerial attack of the war on Ukraine so far and sent as many as 367 drones and missile...