Israeli forces unleashed a series of strikes on the Yemeni capital, Sanaa, and the western city of Hodeidah on Thursday, killing at least six people and injuring dozens more, the Iran-backed Houthis said in a statement where it vowed to retaliate.

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.

Director-General of the World Health Organization, Tedros Adhanom Ghebreyesus, says he was close to the departure lounge when it was hit.