https://twitter.com/Breaking911/status/1345953309048385536?s=19
https://breaking911.com/breaking-multiple-explosions-reported-in-downtown-pittsburgh/
The Pittsburgh Police Bomb Squad and the Fire Investigation unit are investigating after at least one “incendiary device” that was thrown from a moving vehicle in the 3600 block of Penn Avenue just after 9 p.m. Witnesses report people fleeing from the scene.
A parked vehicle was damaged in the first incident. There were no reported injuries.
Police are also investigating a report of an explosion in the 200 block of Dinwiddie Street in the Hill District just after 10:30 p.m.—According to police scanner traffic, a shooting was also reported around the same time in the area.
Explosions Gunfire in Pittsburgh
https://www.post-gazette.com/news/crime-courts/2021/01/03/explosion-in-Pittsburgh-Lawrenceville-3600-block-Penn-Avenue-IED-police/stories/2021010301
they are saying an IED