Emergency crews were called to the river between the Andy Warhol and Rachel Carson bridges just before 1 a.m.
When crews arrived, they found the boat fully engulfed in flames. The fire was put out, and the boat eventually sank.
River Rescue searched the area, but could not find anybody on the boat or nearby in the water.
Police obtained surveillance video showing a person boarding the boat, then running away shortly before the fire broke out.
The Pennsylvania Fish and Boat Commission was notified about the incident.
Anyone with information is asked to call the Pittsburgh Fire Investigative Unit at 412-782-7646
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.
Boat Fire Allegheny River A boat caught fire on the Allegheny River in Downtown Pittsburgh. Police obtained surveillance video that shows a person getting on the boat, then running away shortly before the fire broke out.