The Worcester Emergency Management Department and United Way of Central Massachusetts are assisting residents of a Worcester apartment building that was evacuated Friday afternoon after the roof partially collapsed, officials said.

Residents of the 32-unit building at 257 Mill St. were evacuated on Friday after the roof on the third and second floors collapsed, Acting Deputy Chief Adam Roche said.

The Department of Emergency Management and United Way are assisting displaced residents with temporary placement at a local hotel, Roche said.

Almost all of the residents were escorted through the building on Friday evening to collect emergency personal items, including medicine, keys and cash.

A structural engineer visited the building on Friday, but no decision has yet been made on the overall structural stability of the building.

It’s unclear how long residents will be relocated, Roche said.

No one was injured in the incident and all residents inside the building were safely evacuated.

The partial collapse appears to have occurred while work was underway on the roof.

“Stone was being unloaded from the roof and it piled up in the area of ​​the collapse,” Roche said. “The roof support gave way under the weight of the stone which was concentrated in one area.”

Two balconies also collapsed as a result of the partial collapse.

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