Speaking ahead of a Nato summit, the president says US negotiators can keep talking with the Iranians "if they want".

The negotiating process is fragile and recent US strikes show how hard it will be to reach agreement, writes BBC's International Editor Jeremy Bowen.

Police said a major operation was under way in the area of Welfen-Gymnasium secondary school in Schongau, Bavaria.

The remains of Iran's late supreme leader are transported to Najaf and Karbala, as funeral ceremonies continue for a fifth day.