A missile strike hit a Medecins Sans Frontiers (also known as Doctors Without Borders) clinic in Northern Yemen on Sunday, killing four people. MSF spokesperson Malak Shaher said the strike took place in the Razeh district of Sanaa province, AFP reported. MSF is not yet sure who was behind the attack, which also injured at least 10 people. This is the third such incident at an MSF clinic in Yemen in the last few months. A health centre belonging to the aid agency in Kunduz, Afghanistan (pictured above) was also attacked on October 3.

The group condemned the attack, and said that patients had been moved to other MSF-supported hospitals. In a statement, the agency said casualties could rise since more people are feared to be trapped in rubble. The Saudi Arabia-led coalition also said it would investigate the incident.

MSF director of operations Raquel Ayora said the organisation regularly shared coordinates of its health centres to groups fighting in Yemen. “There is no way that anyone with the capacity to carry out an air strike or launch a rocket would not have known” the location of the clinic, Ayora said.

An MSF clinic in Taez and another near Saada were hit by air strikes between October and December. A military coalition led by Saudi Arabia has been warring against Houthi rebels in the country. Almost 6,000 people have been killed since the coalition began fighting rebels in March 2015.