Press TV - More than a dozen Yemeni fishermen have lost their lives and several others sustained injuries when Saudi fighter jets targeted their fishing boats off the coast of the western province of Hudaydah as the Riyadh regime continues its atrocious military campaign against its crisis-hit southern neighbor.

Yemeni military sources, speaking on condition of anonymity on Sunday, told Yemen�s al-Masirah television network that Saudi warplanes struck two fishing boats in waters off the�Seven Brothers Islands, also known as the�Sawabi Islands�or�Seba Islands, in the Bab el-Mandeb�Strait, killing 13 people and injuring four others.

The sources added that another four Yemeni fishermen remained unaccounted for.

Later in the day, scores of Saudi troopers and Saudi-backed Yemeni militiamen loyal to the former president, Abd Rabbuh Mansur Hadi, were killed and injured as Yemeni army troops, backed by allied fighters from Popular Committees, made territorial advances in the Hayran district of the northern Yemeni province of Hajjah.

Moreover, Yemeni troopers and their allies shot and killed five Saudi mercenaries at the al-Alab border crossing�of�the kingdom�s southwestern�border region of Asir.

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.