PETERSBURG, Va. -- Cleanup continues at a medical waste services building in Petersburg, where an explosion caused the building to partially collapse last month.

The explosion at Curtis Bay Medical Waste Services in the 1900 block of Puddledock Road injured three people.

Two weeks later, part of the building is still unsafe for investigators who are still trying to figure out what exactly happened that day.

Howard Burnette says he won’t ever forget March 31, 2017.

“'It was a very, very scary day,” he said.

Burnette, who works next door to Curtis Bay Medical Waste Services, was outside changing tires when a piece of debris flew across his face.

More at source: CBS

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