Rescuers attempting to free students trapped in the rubble of a collapsed Islamic school in Indonesia ‘s East Java province, where three people were killed, faced greater challenges on Wednesday after an earthquake that officials fear may have compacted the debris further.

Authorities said 91 people were listed as missing, with 100 evacuated and dozens injured after the collapse during students’ late afternoon prayers in a mosque on the lower floor of a building whose upper floors were still under construction.

Tuesday’s quake of magnitude 6.5 reduced the space for the people still trapped, complicating the task of rescue by narrowing the room for manoeuvre, said Emi Frizer, an official of Indonesia’s search and rescue agency.

“How to hold on to the targets’ lives while still having

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