Is Trump linking Manchester attack to Islamist violence?

While in the West Bank, Trump appeared to link Monday night's deadly suicide bombing in the British city of Manchester to Islamist violence.

Trump, speaking in Bethlehem following talks with Palestinian Authoritry President Mahmoud Abbas, said that the attack illustrated the need to tackle Islamist extremism - a theme he talked about in a speech in Saudi Arabia on Sunday.

Expressing condolences to those injured and the families of those killed, Trump said the attack had been carried out by "evil losers".

Authorities in the UK have not yet identitied those who carried out the bombing, which killed 22 people.