At least six people were killed, including a women and two children, as Saudi jets targeted the district of Saqayn in Sa’ada early on Wednesday.
Nine people were also killed and five more injured in Saudi airstrikes targeting the province's Razih district.
A residential area in the northwestern Hajjah province’s Harad district was also bombarded by Saudi jets late on Tuesday, leaving one person dead and several people injured.
Earlier, a refugee camp was also targeted by Saudi warplanes in the same province, Press TV reported.
According to reports, a total of 18 airstrikes were carried out by Saudi jets on an army airbase in the western province of Hudaydah.
Since late March, over 2,600 people have been killed and more than 11,000 others injured by Saudi Arabia's airstrikes on Yemen, according to the United Nations.