Two persons were killed and seven others injured in an explosion at a chemical factory at Ambernath in the district today, officials said.
The mishap occurred around 1:30 pm, triggering a major fire at the unit, they said.
According to a Disaster Control official, the owner of the unit, located in the industrial area, identified as S Narayan was one of the victims.
Fire was contained after five hours by around twelve fire engines, he said.