Protesters took to the streets in Lancaster, Pa., on Sunday just hours after police fatally shot man who authorities said was captured on bodycam video "brandishing a knife over his head" in a threatening manner.

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Lancaster District Attorney's Office said that the investigation is in its early stages. But videos emerged online that showed protesters outside the Lancaster Police headquarters and calling for accountability.

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The office released a statement on Sunday night that said the 27-year-old who was shot dead, Ricardo Munoz, was armed with a knife and pronounced dead at the scene Sunday evening.

The office said that the video showed Munoz emerge from a house and brandish the knife in a threatening manner. Body camera video showed the officer fire several shots at Munoz, who then falls to the ground.

“The officer then fired,” the statement read. “No one else was struck.”

The officer was placed on administrative leave, according to local news outlets.

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“A police-involved shooting has a significant impact on a community, as we are seeing with the large number of individuals gathering in the streets,” District Attorney Heather Adams said, according to CBS Philadelphia. “However, I am asking that all reactions be tempered as the investigation is ongoing.”

Hundreds of protesters took to the streets of Lancaster following the shooting.The crowd formed outside the police station, where the department stated multiple buildings and government vehicles were damaged by demonstrators. Videos emerged from the scene showing protesters apparently slamming on the building's front door.

Police eventually deployed tear gas on a crowd of people protesting early Monday. Police said protesters “failed to follow the instructions."  Police said protesters threw glass bottles, gallon jugs filled with liquid and parts of plastic road barricades at officers.

The Associated Press contributed to this report