Workers try to release two bodies trapped in the rubble of a collapsed garment factory building Tuesday in Savar, Bangladesh. Emergency workers hauling large concrete slabs from the collapsed eight-story building said they expect to find many dead bodies when they reach the ground floor.

SAVAR, Bangladesh — A Bangladesh court on Monday allowed police 15 days to interrogate the owner of a building that collapsed last week and killed 382 people, as rescuers used heavy machinery to cut through the destroyed structure after giving up hopes of finding any survivors.

Mohammed Sohel Rana, who was arrested on Sunday near the border with India, will be held for questioning on charges of negligence, illegal construction and forcing workers to join work. His father, Abdul Khaleque, was also arrested on suspicion of aiding Rana to force people to work in a dangerous building.

The illegally constructed, 8-story Rana Plaza collapsed in a heap on Wednesday morning along with thousands of workers in the five garment factories in the building. About 2,500 survivors have been accounted for.

Rana was brought to the Dhaka Metropolitan Magistrate’s Court in a bullet-proof vest, and led away to an unknown detention place after the magistrate granted a police request to hold him longer before filing formal charges. The crimes he is accused of carry a maximum punishment of seven years. More charges could be added later.

The collapse was the deadliest disaster to hit the garment industry in Bangladesh that is worth $20 billion annually and supplies global retailers.

In renewed anger against conditions in garment factories, hundreds of workers poured into the streets in a Dhaka suburb and set fire to an ambulance Monday, the Independent TV, a private network, reported. They also tried to set fire to a factory, it said.