'Evil Losers': Trump Responds to Ariana Grande Concert Bombing, ISIS Taking Credit

And according to CNN, that may be ISIS, which has claimed responsibility for the attack. However, CNN notes the terrorist organization regularly takes credit for attacks it has no proven links to and the police investigating the tragedy did not yet name the group, either.

"So many young, beautiful, innocent people living and enjoying their lives, murdered by evil losers," Trump said at a press conference from the Middle East on Tuesday. "I won't call them monsters because they would like that term, they would think that is a great name."

"I will call them, from now on, losers because that's what they are: losers," Trump added.

At least 22 people, including children, were killed in a blast at the Manchester Arena in the United Kingdom on Monday, making it the most deadly terror attack on British soil since the 2005 London bombings. Police have said a man armed with explosives executed the attack on his own and died in the blast, but a 23-year-old man was arrested Tuesday in south Manchester in connection to the attack, CNN reported.

MSNBC reported that later on during an appearance at the Israel Museum in Jerusalem, Trump called on the entire world to "obliterate this evil ideology and protect and defend our citizens and people of the world."

"All civilized nations must be united in this effort," he said. "This trip is focused on that goal, bringing nations together around the goal of defeating the terrorism that threatens the world and crushing the hateful ideology that drives it so hard and seems to be driving it so fast."