Iran-backed Huthi rebels have violated a day-old truce in Yemen, the Saudi-led coalition which had been bombing the rebels said on Thursday, vowing to stick to the pause.

"The Huthi militias have violated the truce", the coalition said in a statement carried by the official Saudi Press Agency.

The statement alleged 12 contraventions of the ceasefire, which began at 2000 GMT on Tuesday, along the Saudi-Yemen border and in Yemen itself.