Local officials reported that the air strikes launched by Saudi-led coalition killed six civilians in the southwestern Yemeni town of Jibla on Monday while targeting the home of a leader of Iranian-backed Houthis.
According to local sources, almost a dozen of people were also killed in another air strike in the northern province of Al Jawf.
In Red Sea port of Hodaida, there were other air strikes which pushed fighters who support the exiled government closer to Houthi refugees.
In the meantime, a fight took place between the tribal militiamen and Houthi forces throughout the mountainous area of Ibb, which lies between the coast and the Houthi-controlled capital city Sanaa.
Being supported by Gulf Arab planes, weapons and training, loyalist forces are severely attacking against the Houthis get a string of gains since breaking out of the southern port of Aden last month.
Last September, the Houthis captured the capital Sanaa, claiming it a revolution against a corrupt government and later took over much of the country.
Seeking a refuge, President Abd Rabbuh Mansur Hadi fled Aden for Riyadh in March. In order to help the president, Saudi Arabia and some other Sunni Arab countries intervened in the conflict to drive back what they see as a spreading Iranian threat in their backyard.
Thus, apart from diseases and hunger, the war also hit Yemen, one of the Arab world's poorest states, killing more than 4,300 people, many of them civilians.
Local officials added that in Monday's air raids, the attack on Jibla, a town in Ibb province, six more civilians were killed. However, whether the Houthi leader who had been targeted was among the victims was not clear.
In Hodaida, the city that Houthis took the hold of in last October, civilians stated that Saudi-led warplanes attacked military installations and killed 13 people.
The Houthis, Shia Muslims from north Yemen, deny any Iranian support.
Meanwhile, the United Nations is trying to bring a political deal to end the fighting to avoid a final showdown and to protect against a political gap in the country, which turns to be a shelter for active branches of Al Qaeda and ISIS.