Indian authorities are set to begin a forensic investigation into the cause of a fire that broke out on Saturday at a Tata Electronics factory that makes components for Apple iPhones, a Tamil Nadu state official said on Sunday.

The fire at the plant in the city of Hosur began in an area used to store chemicals, a fire official told Reuters. Two workers who were hospitalized are likely to be discharged on Sunday, she said.

J. Saravanan, a senior district official who handles industrial safety stated that “We can’t go in now because the passage is destroyed. It will take a day to cool down.”

A forensic team from state capital Chennai has been dispatched. It wasn't clear whether the fire affected surrounding buildings, one of which is set to start assembling iPhones by year-end.