At least 15 workers were feared killed in an explosion Saturday at a gelatin manufacturing plant in western India, a news report said.

The blast near Nasik city was so powerful that a three-floor building inside the factory complex collapsed, the Press Trust of India news agency said quoting unnamed police officials.

The explosion occurred early Saturday, when there were about 20 workers inside the factory that operates round the clock through three shifts, the PTI report said.

Police have so far recovered two dead bodies from the debris, while two injured workers were rescued and taken to a nearby hospital for treatment, it said.

Officials in Nasik, 745 miles southwest of New Delhi, could not be immediately reached for comments.