Doubts persist over the outcome of the probe by the Special Investigation Team (SIT) of the Kolkata Police formed to look into the complicity of “unknown persons” in the collapse of the Majerhat bridge.

Thanks to the tardy progress of the probe as the SIT is yet to interrogate the officers concerned despite having completed the same when they had recorded statements of 72 persons including the workers of the Metro Railways, who were on duty when the bridge had collapsed.

Eyebrows have been raised over the alleged lax attitude of the SIT mandated with booking the accused found in the probe.

Asked to comment on the purported interrogation of the officers concerned in the bridge collapse, Mr Praveen Tripathi, Joint Commissioner of Police (crime), who is heading the SIT, said: “ Probe is on. We are still to issue summons to any officers for interrogation in the Bridge collapse case so far. We will summon if probe finds someone guilty.”

On 4 Septemeber, a portion of the Majerhat bridge had collapsed killing three persons and injuring more than 20. A case had been lodged at the New Alipore police station after the incident against “unknown persons”.

Later, a SIT headed by Mr Tripathi was formed by the Kolkata Police to investigate the case against unknown persons. They had examined 72 persons so far sans the officers.

Meanwhile, a team of experts from the National Test House collected samples from the spot and sent them for forensic test.