Israel struck multiple targets in Yemen it said were controlled by Houthis, the last of the Iran-backed groups still fully engaged in the regional war that began 14 months ago.

Israeli forces unleashed a series of deadly strikes on the Yemeni capital Sanaa and the western city of Hodeidah on Thursday, according to Houthi-run media, killing at least four people and injuring more than a dozen others.

The head of the World Health Organization said he was about to board a flight in the Yemeni capital when the airport came under bombardment.