Fresh air strikes and clashes in Yemen have killed over 60 fighters as Saudi-backed pro-government forces push an offensive against Houthi rebels, security and medical sources said on Monday.

Saudi-led coalition air raids overnight killed at least 18 of the Iran-backed rebels in Hais, south of the key port of Hudaida, while bombardments from gunships left 35 others dead in nearby Tahita, a security official told AFP.

The latest fighting killed 12 government troops and wounded 19 more, military and medical sources said.

On the outskirts of the capital, Sanaa, a witness told AFP that seven members of the same family including women and children were killed by a coalition air strike on Monday.