The toll in the warehouse collapse in Kolkata has risen to nine, West Bengal Chief Minister Suvendu Adhikari said in the Assembly on Thursday.

The under-construction warehouse near Brace Bridge in the Taratala area had collapsed on Wednesday, trapping several persons under the rubble.

At least 20 persons were injured in the incident, said the chief minister.

A total of 31 persons have been rescued, the Indian Army’s Eastern Command said on Thursday, adding that several others are feared trapped under the rubble.

The chief minister announced an ex gratia of Rs 10 lakh each for the families of those killed and Rs 1 lakh for each injured person.

The Prime Minister's Office also announced an ex gratia of Rs 2 lakh each for families of those who have lost their lives. The injured will receive Rs 50,000.

Meanwhile, Kolkata Police arrested five persons after overnight raids in the city, PTI reported.

The police have also constituted a Special Investigation Team to probe the collapse.

Edited by Sneha.