NEW DELHI: A five-story under-construction building on Sunday night collapsed in Kolkata in West Bengal, killing at least 10 people as per local reports. 

The building was located adjacent to the slum at Hazari Mollah Bagan in Garden Reach. The tragic incident happened around midnight. The building was being constructed illegally. 

Several people were injured and local reports said that a search operation is underway to find more survivors who may be trapped under the ruins. 

The police were reportedly instructed by Chief Minister Mamata Banerjee to arrest Mohammad Wasim, who is the promoter of the building. He was nabbed on Monday. 

West Bengal Governor CV Ananda Bose also arrived at the incident site to take stock of the operation being carried out by the emergency services. 

"The government has the option to set up task forces to identify all the unauthorised constructions and take immediate necessary steps," Bose said while addressing the media during his visit. 

When the initial toll was released, authorities revealed the identity of the victims as Hasina Khatun (55), Shama Begum (54), Akbar Ali (34), Mohammad Wasik (30), and Rizwan Alam (22). Over a dozen, including three children, are currently undergoing treatment at a city hospital. 

The administration fears that the number of casualties may go up as the condition of some of those injured is critical, while a few more may be still trapped under the debris.