Eight military vehicles were destroyed and 60 rebels killed in 11 operations over 24 hours to hunt down rebels, it said in a statement carried by the official Saudi Press Agency.

It said the operations were carried out in Sirwah to the west of Marib and Al-Jawf province to the north.

The coalition has reported high death tolls on a near daily basis by the coalition, amounting to over 3,000 deaths among the rebels since mid-October.

The Iran-back Shiite Huthis rarely comment on casualties, which cannot be independently verified by AFP.

A Yemeni military official said Wednesday that 28 fighters from the pro-government Obaida tribe and seven government forces were killed in clashes with rebels south of Marib over the previous 24 hours.

A military official in the government told AFP last week that the Huthis have made advances in the south.

Saudi Arabia intervened militarily in Yemen in 2015 to prop up the internationally recognised government after the Iran-backed Huthi rebels seized the capital Sanaa the year before.

The rebels have intensified their efforts to capture Marib since September after a lull in their advance which began February.

The capture of the strategic oil-rich city would aid the Huthis' expansion to other provinces, marking a major blow to the coalition.

Since the start of Yemen's conflict, tens of thousands of people, mainly civilians, have been killed, and millions displaced in what has been described by the UN as the world's worst humanitarian crisis.