Kolkata: One person was killed and three grievously injured in an explosion in West Bengal's Birbhum district, police said today.
The incident took place on Thursday night in the Ilambazar police station area in the district.
"One man has been killed and three others seriously injured in an explosion. According to preliminary reports, the explosion occurred while they were making crude bombs," an officer of Ilambazar police station said.
No arrest has been made in this connection so far.