Sanaa, June 19 (RHC)-- Saudi fighter jets have reportedly used cluster bombs in their fresh attacks against Yemen's northwestern province of Hajjah as Riyadh pushes ahead with a military onslaught against its impoverished southern neighbor.

Late on Thursday, Saudi warplanes dropped cluster munitions on populated areas in the al-Mazraq district of the province, located about 300 kilometers (186 miles) northwest of the capital, Sana'a, Lebanon-based Arabic-language al-Mayadeen news network reported.

Human Rights Watch, in a report published on May 31, announced that evidence shows Saudi Arabia has been pounding Yemen with internationally banned cluster bombs, warning that such attacks are "harming civilians."

The human rights organization also posted photos showing remnants of cluster munitions and unexploded submunitions found in several areas, including al-Nushoor and al-Maqash in Sa'ada, noting that three types of cluster bombs have been used in the Saudi attacks.

Nine civilians lost their lives as Saudi warplanes bombarded residential buildings in the Bani Moein district of Ghamr region in Yemen's northwestern Sa'ada Province. There were no reports of casualties.

Additionally, 13 Yemeni civilians were killed, when Saudi warplanes struck Ghomam region in the Razih district of the same province.

Meanwhile, Yemeni army soldiers and fighters from allied popular committees lobbed a number of rockets at the Ain al-Harra military base in Saudi Arabia's oil-rich Eastern Province, though no information is available on the possible casualties and damage to the site.

The army and popular committees forces also fired a number of rockets at Saudi military sites in Mount Rumaih, Mount Dukhan, Mount Doud of Saudi Arabia's southwestern and border region of Jizan, and a border post in the Saudi village of al-Khobah on the Saudi border with Yemen.