The death toll from the explosion and fire at Sigachi Industries' chemical factory in southern India has risen to at least 39, officials said on Tuesday, forcing the supplier of pharma products to shut operations for 90 days.

At least 34 people have been killed in a massive fire at a pharmaceuticals factory in the southern Indian state of Telangana, according to news agencies. The blast took place during work hours on Monday at a unit of Sigachi Industries, leaving several injured and in critical condition.

The death toll from Monday’s massive explosion and fire at a pharmaceutical factory in India’s southern state of Telangana has risen to at least 36 while about three dozen are injured, authorities said Tuesday.

Investigators probing the deadly Air India crash on June 12 have confirmed that sabotage has not been ruled out. Some 274 victims were killed when the Boeing 787-8 Dreamliner plunged into a building, shortly after it took off from Ahmedabad Airport in India on its journey to London Gatwick in the United Kingdom.

A panel of Indian lawmakers will review safety in the country's civil aviation sector and has invited several industry and government officials to answer questions on July 9, with topics set to include Air India's recent plane crash.

The preliminary probe report on the Air India crash, in which at least 270 people were killed - including 241 on board the flight - is expected to be released by July 11 and will outline the possible causes.