Trump says Iran and Israel may have to fight it out

US President Donald Trump told reporters before heading to the G7 summit in Canada that he hoped for a peaceful resolution to the Iran-Israel clash but the two enemies may have to keep fighting.

"Well I hope there's going to be a deal. I think it's time for a deal and we'll see what happens but sometimes they have to fight it out but we're going to see what happens. I think there's a good chance there will be a deal," he said.

Trump declined to say if he requested Israel pause its attacks on Iran but said Washington would continue to aid Israel's defense against Iranian missiles.