Update, 8:25 p.m.: The man in question was taken into custody just before 7:30 p.m., police said Friday night.
Original story, 6:05 p.m.: Philadelphia police are responding to a barricade situation involving a man armed with a knife inside a Center City high-rise.
A heavy police presence formed around City Hall on Friday afternoon.
Officials said the incident began around 5:15 p.m. in the 1500 block of Ranstead Street.
A male vandal was allegedly breaking out the windows of a building before barricading himself inside the high-rise with a knife.
The incident remains active and under investigation.
Residents and pedestrians in the area expressed concern on social media about the commotion near City Hall.
Check back for updates on this developing story.