1 injured in residential blast in Kolkata, 3 detained; NIA begins probe

A crude bomb blast inside a rented room in Kolkata's Rajarhat left one person injured, police said. Three people have been detained, while the National Investigation Agency (NIA) has begun probing the incident. According to reports, a man entered the building with white jute bag, placed it inside a room and left. Minutes later, a powerful explosion rocked the building.