More than 15 people were killed and at least 20 civilians injured in Yemen on Monday when warplanes bombed a hospital supported by Doctors Without Borders, reported The New York Times. The incident took place at Abs hospital in the northern Hajjan Province. Three Yemeni staff members of Doctors Without Borders were among those who lost their lives. The country's health ministry officials said three foreign doctors and many staffers were also injured in the attack.

The international doctors' forum confirmed the news in a statement released later on Monday. The organisation said at least 4,600 patients were treated at the facility since they started supporting it in July 2015. United Nations Secretary General Ban Ki-moon condemned the attack and said antagonists in the Yemen conflict had damaged or destroyed more than 70 health facilities in the past 17 months.

The organisation's desk manager for Emergency Unit in Yemen, Teresa Sancristóval, said, “This is the fourth attack against a Médecins Sans Frontières (Doctors Without Borders) facility in less than 12 months. Once again, today we witness the tragic consequences of the bombing of a hospital. Once again, a fully functional hospital full of patients and MSF national and international staff members, was bombed in a war that has shown no respect for medical facilities or patients," according to The Guardian.

This comes only two days after at least 19 people were killed when Saudi warplanes struck a school in a residential area in the northern part of the country. A Saudi-led coalition is backing the Abedrabbo Mansour Hadi government in its fight against Houthi rebels, according to BBC.