Transcript for Trump calls out 'evil losers' behind deadly Manchester blast

We saw president trump reacting this morning to the attack while traveling in Israel and our chief white house correspondent Jon Karl is with him there. Good morning, Jon. Reporter: Good morning, robin. Just a short while ago the president spoke over the phone with British prime minister Theresa may offering his condolences and support for the British people. He called this a horrible morning of death for innocent young people and he made his remarks condemning the attack while he was standing next to Palestinian leader Mahmoud abbas. In doing so he offered a new label for terrorists and for whoever was responsible for this attack, losers. We stand in absolute solidarity with the people of the United Kingdom. So many young, beautiful, innocent people living and enjoying their lives murdered by evil losers in life. I won't call them monsters, because they would like that term. They would think that's a great name. I will call them from now on lo losers because that's what they are. They're losers. Reporter: The president's choice of words was quite deliberate. As you can see he seemed to be reading and it's striking how different this was from the way we have seen Donald Trump respond to previous major terrorist attacks. There was no reference to radical islamic terrorism, no talk of profiling. He did issue a call for unity in fighting terrorism and what he said until the wicked ideology is forever obliterated, very tough words, robin, but unlike what we've seen from him previously, there was no rush to judgment and no suggestion whatsoever that Islam was responsible, robin. Jon, thank you very much.

This transcript has been automatically generated and may not be 100% accurate.