The international medical group Medecins Sans Frontieres (MSF) condemned on Sunday a projectile attack on its clinic in Razeh district of Saada province in northern Yemen.
MSF said it’s not clear who is behind the attack which killed four people and wounded 10.
Three MSF personnel were among the wounded, two of them in “critical condition.”
Regional MSF operations chief Raquel Ayora said all warring parties are regularly informed of the GPS coordinates of their medical sites, and that MSF was in constant dialogue with them.
"There is no way that anyone with the capacity to carry out an air strike or launch a rocket would not have known that the Shiara Hospital was a functioning health facility providing critical services and supported by MSF," she said.
"The numbers of casualties could rise as there could still be people trapped in the rubble," MSF added.
“Once more it is civilians that bear the brunt of this war,” Ayora said.
— MSF International (@MSF) January 10, 2016
All staff and patients are evacuated and transferred to another MSF hospital in Saada.
"This is the third severe incident in the last three months," MSF said on its Twitter account.
Last month, an MSF hospital in Taez was hit by the Saudi-led coalition, in which nine people including staff were injured.
In October, air strikes have hit another MSF hospital in Saada, in which two staff were injured and the building crashed.
Yemeni President Abd Rabbuh Mansour Hadi had to temporarily move to the Saudi capital Riyadh in March 2015, and formally request Arab states to help “save Yemen” from Houthi expansion .
Saudi Arabia is leading a military coalition that formally intervened in Yemen on Mar. 25 to reinstate Hadi. Iranian-backed Houthi rebels have been battling with the Saudi-led coalition since then.
War in the country has triggered an unprecedented humanitarian crisis in Yemen.
Almost 6,000 people have been killed in the ongoing civil war in Yemen, nearly half of them civilians, and more than 27,000 injured since March.
Currently, 80 percent of Yemen’s population is in desperate need of humanitarian aid to meet their basic needs or protect their fundamental rights, including security and safety of civilians and provision of essential services.