Police in Kolkata on Monday, 20 July arrested a third suspect in connection with the explosion that rocked a residential house in the Supari Bagan area of Dakshin Narayanpur, Rajarhat, on the night of 17 July. The arrest brings the total number of persons held in the case to three, as the National Investigation Agency (NIA) continues to probe the incident.

The Latest Arrest

The Narayanpur police station detained Mohammad Hossain following sustained interrogation of the case's main accused, Mohammad Shamim, also known as Selim. Hossain was apprehended from the Rajbati area of Madhyamgram in North 24 Parganas district. Investigators are now working to establish the precise nature of his role in the incident.

According to police, Hossain will be taken into formal custody for further interrogation. The exact extent of his involvement has not yet been disclosed by authorities.

How the Case Unfolded

The explosion occurred late on the night of Friday, 17 July, at a house in the Supari Bagan locality on the northern outskirts of Kolkata. One person was injured in the blast. Officers from the Narayanpur police station launched an immediate investigation and detained two individuals shortly after.

A bomb squad dispatched to the scene subsequently recovered two additional live bombs from the premises — a find that significantly escalated the seriousness of the case. Forensic experts were also deployed to determine the origin and cause of the explosion.

The Accused and the Rented House

Investigators established that Mohammad Shamim had rented the house through a broker identified as Shahenshah just days before the blast. Both Shamim and Shahenshah were arrested in the earlier phase of the investigation. According to police, Shamim had stored the bombs inside the rented premises, which subsequently detonated.

Notably, this is the second fresh arrest linked directly to leads developed from Shamim's interrogation, suggesting the accused may have been part of a wider network. Police are actively investigating why the bombs were stored at the location and what purpose they were intended to serve.

NIA Takes Over the Probe

The National Investigation Agency assumed control of the investigation following the discovery of the live explosives, signalling that central authorities view the incident as potentially linked to a larger security threat. The NIA's involvement also indicates that the case may extend beyond a local law-and-order matter.

Police have confirmed that efforts are ongoing to determine whether additional individuals remain at large in connection with the case. As the investigation deepens, the focus is on tracing the source of the explosives and mapping the full network behind the bomb cache.