Kolkata, Sep 4(DC): A portion of Majerhat bridge in south Kolkata collapsed on Tuesday evening, authorities said.

Several people and vehicles are feared trapped. According to reports, a person has also died in the accident.

Firefighters, police and NDRF personnel along with ambulances have rushed to the spot and rescue operations are underway. Locals have also joined the rescue operations.

The injured have been rushed to the nearby SSKM hospital.

A part of the bridge on the Diamond Harbour road collapsed over rail tracks in the Alipore area at around 4:45 pm.

Speaking to the local media, West Bengal Chief Minister Mamata Banerjee, who is currently in Darjeeling, expressed shock over the incident and assured all possible help to rescue people trapped under the debris. The chief minister has also ordered an inquiry into the collapse.

"We are very worried. We are receiving information from the rescue team on the ground. We want to go back as soon as possible. There are no flights in the evening, we are unable to do so," Banerjee said.

TMC leader Derek O'Brien took to Twitter to inform about the ongoing rescue operations and prayed for those affected in the mishap.