"Many labourers were working on the fourth floor of the building when a slab gave way. We had initially pulled out bodies of four labourers. The toll has gone up to 13 now," a police official said.
"Rescue operations are still underway and we are checking if there are more people trapped under the debris. However, most of them have been pulled out. One other labourer under treatment is in critical condition," he added.
However, the identities of those killed have not been ascertained yet.