At least two workers and seven others have been injured after the ceiling in a shoe factory in Cambodia collapsed, deepening concerns over safety conditions in the global garment industry.

About 50 workers were inside the factory, owned by Japanese sports-shoe brand Asics, when the ceiling caved in.

The concrete ceiling, which appeared to be of “poor construction”, gave way under the weight of heavy iron equipment stored on the floor above, said district police office Khem Pannara.

Two bodies were pulled from the wreckage and seven people were hurt. Rescuers combed through the debris for several hours until they cleared the site and no more people were under the rubble.

Asics Corp. confirmed that the factory south of Phnom Penh is one of its suppliers and said it would investigate the accident and determine if safety precautions were taken, reports Wall Street Journal.

“We would like to offer our deepest condolences to the victims,” Asics spokeswoman Masayo Hasegawa said. “We hope utmost priority is given to rescue efforts. Much remains unclear about the circumstances of this accident, and we are checking to ascertain the facts”.