Special Correspondent

KOLKATA: Four persons were killed and six injured, some of them seriously, in an explosion in a slum beside the Hooghly near the Sarbomangala ghat in the city’s North Port thana area on Sunday.

The incident was “not an act of terrorists” according to preliminary investigations, J. Shamim, Deputy Commissioner, Detective Department (I), Kolkata Police, said.

The source of the explosion was being ascertained though initial reports suggested that it could have been a shell, the police said. The Commissioner of Police, with the bomb disposal squad and other officials, visited the spot.