This story was updated at 12:50 p.m. Saturday with new information on a SWAT team and ambulance arriving, and a man walking out of a home and put on a stretcher.

Several police officers are focused on a Harrisburg property around 18th and Market streets Saturday morning.

No details about the incident have been released, but armed officers in uniform and camouflage, along with at least one police dog, can be seen in the area.

A police source said a person is barricaded in a home in the 1800 block of Market Street.

Closed roads around the incident include 18th, 19th, Zarker and Market streets. Residents are watching from porches and windows.

The incident began around 10:30 a.m. and is still going on an hour later.

Around 12:15 p.m., an officer was seen grabbing a riot shield from a cru

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