Nine Huthis and three members of popular groups were killed in clashes that erupted  between Huthis and popular groups in Abyan governorate, local sources said on Sunday.
Meanwhile, Saudi-led coalition warplanes shelled Houthis positions in Abyan governorate.
Fifteen Huthis were killed and others were injured when tribal gunmen attacked on Saturday evening a Huthi force in Shabwah governorate, tribal sources said.
Also, 20 Huthis were killed when members of popular groups attacked them in Ad Dali governorate.