A video is making the rounds on social media that appears to show a Pittsburgh police officer in an altercation with an attendee of Pride Pittsburgh, the Delta Foundation's annual LGBT pride festival.

The incident reportedly took place near a corner where there were anti-gay protesters throughout the afternoon.

The Delta Foundation's Christine Bryan says the organization has been in contact with authorities throughout the night and "we’re working closely with everyone right now [...] Obviously we’re extremely concerned about it."

Representatives from the mayor's office, Citizen Police Review Board and Public Safety Department did not immediately return calls seeking comment — though a press conference has been called for 11:45 A.M. with a slew of top city officials: mayor Bill Peduto, acting police chief Regina McDonald, public safety director Stephen Bucar, Office of Municipal Investigations director Deborah Walker and city solicitor Lourdes Sanchez-Ridge.

We'll provide updates as more information becomes available.