At least 11 people have been killed and 19 injured in an airstrike on a Medecins Sans Frontieres hospital in northern Yemen.

The attack has been blamed on the Saudi-led Arab coalition which has been waging a war against Houthi rebels.

MSF says a member of its staff at the facility in Hajja province near the rebel stronghold of Saada was among those killed on Monday afternoon.

The charity said the GPS co-ordinates of the hospital were repeatedly shared with all parties involved in the conflict.

"Once again, a fully functional hospital full of patients and national and international staff members was bombed in a war that has shown no respect for medical facilities or patients," MSF said in the statement.


Medics were initially hesitant to evacuate the wounded because of concerns that overhead warplanes could renew their attack, a witness told Reuters news agency.

Image: Yemen has been in upheaval for the last several years

The strikes come less than 48 hours after the charity accused the coalition of killing 10 children in airstrikes on a Koranic school in Saada.

The coalition denied this, saying instead it had bombed a camp at which Iran-backed rebels were training underage soldiers.

BREAKING: #Yemen MSF-supported hospital was hit by airstrikes at 15:45. We are assessing the situation. Number of casualties still unknown. — MSF International (@MSF) August 15, 2016

Riyadh launched airstrikes in Yemen in March last year in order to prop up the country's fragile government.

The coalition has been fighting Shia rebels since they captured the Yemeni capital, Sanaa, in September 2014.

In October last year, more than 40 staff and patients were killed in a US gunship raid on one of the charity's hospitals in Afghanistan.

The US military later said it was a bungled attempt to target Taliban gunmen and US President Barack Obama apologised.