Mumbai, July 18 -- A local of Mumbai's Bharat Nagar and witness of the chawl collapse that took place on Friday, leaving seven people trapped, stated that the reason for the blast was not confirmed.

While speaking to ANI, the local stated that the collapse also caused damage to the mosque located next to the chawl.

"The reason for the blast is not confirmed... The incident happened near the mosque and caused damage to the mosque as well... The fire brigade is conducting a rescue operation.." the local told ANI.

He further stated that no casualties had been reported so far.

"All the people have been safely rescued... There are no casualties reported so far..." he added.

Earlier in the day, at least seven people were feared trapped aft...