On the 13th of April, a convoy of 10 vehicles, mostly consisting of unarmed Jewish doctors, nurses and lecturers on the way to the Hadassah Hospital on the Hebrew University campus on Mount Scopus, Jerusalem, was attacked by Arab irregular forces. For several hours, the British refused to intervene, and attempts by the Palmach to rescue the convoy were unsuccessful. The attack continued for 6-7 hours before the British finally stopped it. Altogether approximately 77 Jews were killed by gunfire or were burnt when several vehicles were set alight.