Press TV - Yemeni army forces, supported by allied fighters from Popular Committees, have fired a domestically-manufactured ballistic missile at a military base in Saudi Arabia�s southwestern border region of Najran in retaliation for the Saudi�regime�s military campaign against their crisis-ridden homeland.

A military source, speaking on condition of anonymity, told Yemen�s Arabic-language al-Masirah television network that the short-range Badr-1�missile struck Mostahadeth base in the western sector of the region, located 844�kilometers�(524 miles) south of the capital Riyadh, on Monday.

The source added that the projectile had hit the designated target with high precision.

Separately, Yemeni forces and their allies�fatally shot�a Saudi soldier at a military camp on Jabal al-Qais mountainous area in the kingdom�s Jizan region.

Moreover, four Saudi-backed Yemeni militiamen loyal to former president Abd Rabbuh Mansur Hadi�were killed when Yemeni snipers targeted them in the al-Zobab�region of Yemen's southwestern province of�Ta'izz.

Also on Monday, Saudi fighter jets carried out a string of airstrikes against residential buildings and properties in the Shada'a district of the northwestern Yemeni province of Sa�ada, leaving substantial damage behind. There were no immediate reports about possible casualties.

Some�15,000 Yemenis�have been�killed�and thousands more injured since the onset of the Saudi-led aggression on�Yemen�in March 2015.

The United Nations says a record 22.2 million Yemenis are in need of food aid, including 8.4 million threatened by severe hunger.

A high-ranking UN aid official has warned against the �catastrophic� living conditions in Yemen, stating there is a growing risk of famine and cholera there.

�The conflict has escalated since November, driving an estimated 100,000 people from their homes,��John Ging, UN director of aid operations, told the UN Security Council on February 27.