The number of students at the Al Khoziny school confirmed dead after the collapse in Indonesia’s East Java province rose to nine on Friday, the country’s disaster mitigation agency said, as the search for survivors continued.

The leader of the search and rescue office in the neighboring city of Surabaya, Nanang Sigit, told reporters that “today we found five victims, they all were found dead,” taking the overall death toll to 10.

It is recorded that two male students who had been hit by debris were discovered on Friday in the school’s ablution area, according to Yudhi Bramantyo, the operations director of the national search and rescue agency.

Thirty ambulances had been prepared as rescuers continued looking for more than 50 students – mostly teenage boys from the ages of 13 to 19 – still trapped under the rubble, the disaster mitigation agency said.

The death toll rose from five a day earlier, the agency said, adding that rescuers had received the parents’ permission to make use of heavy equipment after failing to find signs of life during previous efforts.

Every family of the victims has given their blessing if the heavy equipment gets in there and disturbs the bodies beneath the rubble,” said agency chief Suharyanto, adding that there was a possibility that more dead bodies would be found.

Alongside the ambulances were cranes deployed to dig out some of the debris.

The rescuers dug through tunnels in the remains of the building, calling out the boys’ names and using sensors to locate any movement, but found no signs of life, photos shared by the search and rescue agency show.

The rescue operation was disrupted by an earthquake that struck overnight on Tuesday, briefly halting the search.