Khomeini's health declined several years prior to his death. After spending eleven days in Jamaran hospital, Ruhollah Khomeini died on 3 June 1989 after suffering five heart attacks in just ten days, at the age of 89 just before midnight. He was succeeded as Supreme Leader by Ali Khamenei. Large numbers of Iranians took to the streets to publicly mourn his death and in the scorching summer heat, fire trucks sprayed water on the crowds to cool them. At least 10 mourners were trampled to death, more than 400 were badly hurt and several thousand more were treated for injuries sustained in the ensuing pandemonium.