MOTT HAVEN, Bronx (WABC) -- Repair crews on Thursday took apart what was left of the ventilation shaft that collapsed after an explosion at an apartment building in the Bronx on Wednesday.

It has prompted elected officials are calling on the federal government to do more to keep public housing tenants safe.

The explosion happened at NYCHA's Mitchel Houses on Alexander Avenue in the Mott Haven section just after 8 a.m. on Wednesday.

It is believed to have occurred in the boiler, causing the chimney structure to collapse, officials said.

WATCH VIDEO OF THE EXPLOSION AND COLLAPSE:

No one was injured, but for residents, Thursday was day two of trying to adjust to their new normal. For some, they are still out of their apartments and others are wondering when their heat, hot water and g

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