Saudi-led coalition air strikes on rebel-held security buildings in Yemen's west, including a detention centre, killed 60 people, an official said Sunday, updating the toll from 38 dead.

"Sixty people in total were killed and dozens were wounded," said a health official from the coastal province of Hodeidah where the two raids took place.

Most of the victims were anti-rebel detainees who were being held in two cells at the detention centre, said the source who requested anonymity.