“We are continuing to try to contact the [missing] staff. We cannot speculate on their whereabouts,” the charity said in a statement on Thursday.
The agency, known by its French acronym MSF, said it has set up a hotline in a bid to trace 24 staff and the nine patients who are still unaccounted for.
The statement has sparked fears that the death toll may significantly rise. The latest tally for last Saturday’s attack by US fighter jets stands at 22 dead.