RIYADH 

A woman was killed and two people injured in Saudi Arabia Sunday by shelling from war-torn Yemen, according to the kingdom’s civil defense agency. 

A shell struck a house in the southwestern Jizan region, killing a woman and injuring a man and his son, the agency said on Twitter. 

It, however, did not identify the nationality of those killed or injured in the attack. 

Sunday’s attack came one day after two Saudis were injured when a shell struck their house in the southern Najran province from Yemen. 

The Saudi-Yemeni borderline has been witnessing rising clashes between Saudi troops and Yemen’s Houthi rebels in recent months. 

Last week, three Saudi children were killed by shelling from Yemeni territories. 

Yemen has been ravaged by civil war since late 2014, when Houthi rebels overran capital Sanaa and forced the government of President Abd Rabbuh Mansour Hadi to flee to Riyadh. 

The conflict escalated last year when Saudi Arabia and its Arab allies launched a massive military campaign aimed at reversing Houthi military gains and restoring Hadi’s government. 

According to the UN High Commissioner for Refugees (UNHCR), more than three million Yemenis have been displaced by the ongoing conflict in the Arab country. 

*Reporting by Ahmed al-Masri; Writing by Mahmoud Barakat