U.S. President Donald Trump on Tuesday called the people behind the bombing at an Ariana Grande concert at the Manchester Arena in Manchester, England “evil losers in life.”

He said they killed “so many young, beautiful, innocent people living and enjoying their lives.”

Trump spoke in the Middle East on his first foreign trip, saying he would not call those responsible “monsters, because they would like that term. They would think that’s a great name.”

He added: “I will call them, from now on, losers, because that’s what they are. They’re losers, and we’ll have more of them, but they’re losers. Just remember that.”

Earlier, Greater Manchester police said they are treating the bombing as a “terrorist incident until police know otherwise.” Media reports also quoted U.S. officials as saying that U.K. authorities suspect the Manchester incident was “conducted by a suicide bomber,” and they later said the bomber’s body has been identified.

The attack killed 22 people and left 59 injured, according to updated figures from early Tuesday.