Rescuers ran oxygen and water to students trapped in the unstable concrete rubble of a collapsed school building in Indonesia, as they desperately worked to free survivors Tuesday morning more than 12 hours after the structure fell.

At least one student was killed, dozens were injured and 65 were presumed buried in the rubble.

Rescue workers, police and soldiers digging through the night pulled out eight weak and injured survivors more than eight hours after the collapse at Al Khoziny Islamic Boarding School in the East Java town of Sidoarjo.

Rescuers saw additional bodies, indicating the death toll was likely to rise.

Rescue efforts were temporarily suspended at 10:15 a.m. as the collapsed concrete shook suddenly, indicating another collapse could be imminent.

People immediately ran for their lives, some screaming, as rescuers urged everyone in the area to avoid the building, including more than a dozens of ambulances that parked near the scene.

Families of the students gathered at hospitals or near the collapsed building, anxiously awaiting news of their children.

Relatives wailed as they watched rescuers pull a dusty, injured student from the buried prayer hall.

A notice board at the command post set up in the boarding school complex listed 65 students as missing as of Tuesday morning.

They are mostly boys in grades seven to 11, between the ages of 12 and 17.

Several hundred rescuers were involved in the effort and had equipment for breathing, extrication, medical evacuation and other support tools.

Authorities were investigating the cause of the collapse.