Press TV- Saudi fighter jets have intensified their airstrikes against Yemeni provinces, using more internationally-banned arms in their latest raids.

According to Yemen�s al-Masirah television, Saudi Arabia dropped cluster bombs on Harad district in Hajjah Province on Monday.

Cluster bombs, which can contain hundreds of bomblets, pose risks to civilians both during and after attacks. Unexploded bomblets can claim lives long after a conflict is over.

Multiple rights groups, including Amnesty International and Human Rights Watch, have on various occasions reported the use of cluster bombs by Riyadh in Yemen.

Saudi fighter jets also launched two airstrikes against residential areas in Amran Province and another two on Dhahir district in the province of Sa�ada on Monday.

The kingdom�s warplanes further�pounded a residential building in Asilan district in Shabwah Province.

Three other air raids hit the Madfoun area and Asrat valley in Nihm district, northwest of the Yemeni capital, Sana�a.

There were no immediate reports of possible casualties.

In Nihm,�the Yemeni troops killed 15 Saudi-backed mercenaries in an attack on the militants� positions on Monday, a day after tens of the mercenaries, including five commanders, were killed during clashes with Yemen�s forces there.

In another retaliatory attack, Yemeni army snipers killed a Saudi solider in Tal�a military base in Saudi Arabia�s southwestern province of Najran on Monday.

The Yemeni forces also fired a volley of Katyusha rockets at Qarn military base in Jizan Province in southwestern Saudi Arabia.

Saudi army�s position in Hamraa hill in the same province was also targeted by Yemeni artillery attacks.

Meanwhile, a fire erupted at a Saudi military base in Jizan�s Muthalath al-Rokhba after the Yemeni troops fired artillery shells at the site.

On Sunday, the Yemeni forces launched rocket attacks on al-Meqran military base in Jizan, killing and injuring a number of Saudi officers.

Yemeni media also released footage on Sunday showing the losses and casualties suffered by Saudi army and its mercenaries near Khadra border crossing in Najran as Yemeni forces thwarted their attempts to advance in the area.

The Yemeni troops also seized a large amount of weapons and ammunition from Saudi mercenaries during�the operations.

Saudi Arabia began its military aggression against Yemen in late March, 2015 in a bid to restore power to former president Abd Rabbuh Mansur Hadi.

The campaign has claimed the lives of more than 11,400 people, according to figures compiled by the Yemeni non-governmental monitoring group Legal Center for Rights and Development.