Saudi Arabia says it has launched an investigation after an aid group says its coalition targeting Shiite rebels in Yemen struck one of its clinics.

Doctors Without Borders says a Saudi-led airstrike Wednesday near Taiz in southern Yemen hit its clinic there, wounding nine people.

In a statement carried Friday on the state-run Saudi Press Agency, the kingdom said it was investigating and vowed “to publish, with the utmost transparency, the findings.”

However, its statement also said aid groups need “to conduct pre-emptive coordination” with its military campaign. Doctors Without Borders says it provided the clinic’s coordinates several times to the military campaign, but it still was struck.

An Oct. 26 Saudi-led airstrike destroyed another small hospital run by Doctors Without Borders in Yemen’s northern province of Saada.