Saudi Arabia continued with its airstrikes against the Shi'ite Houthi rebels, with the latest attack killing at least eight people in the Yemeni capital Sana'a.

The Saudi-led coalition has been carrying out the aerial bombing campaign against the Houthis, who are widely thought to be backed by Shi'ite-inclined Iran, though there was a lull in the offensive in recent days.

According to Reuters, which cited local residents and eyewitnesses, no less than 35 bombings have been conducted in the northern Saada province, a key stronghold of Houthis.

The Saudi warplanes are believed to have targeted military bases and residents of key Houthi leaders in the province.

The Houthi-backed Saba news agency reported eight people were killed and 10 others injured during Thursday's attack in the Yemeni capital while two people were killed in Saada.

Yemen has been toiling under severe unrest and fighting over several months ever since Shi'ite Houthi rebels seized control of many parts of the country from government forces. The advances by the Houthi rebels forced the Sunni powerhouse and Yemen's neighbour Saudi Arabia to wade into the conflict in March 2015.

According to estimates, about 2,800 people, including dozens of civilians, have been killed ever since Riyadh began its airstrikes. Besides that more than 21 million people are in need of humanitarian aid.