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 Houthi militant group said in a statement.

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

The U.N. air crew member hurt in an air strike on Yemen's main international airport on Thursday suffered serious injuries but is now recovering in hospital, a spokesperson for the World Health Organization said on Friday.