PITTSBURGH – (WPXI) – A Port Authority bus, with a passenger on board, was swallowed by a massive sinkhole Monday downtown. The bus fell into the giant sinkhole at 10th Street and Penn Avenue just before 8 a.m. Police have closed Penn Avenue from 9th to 11th streets. Tenth Street is closed from Liberty Avenue to Fort Duquesne Boulevard. The underpass at the Convention Center is also closed. City officials said that 10th street will likely be closed for 6-8 weeks. The woman driving the bus and a second woman who was a passenger both managed to get off the bus and through the front door, Port Authority officials said. The passenger was treated by paramedics and was taken to a Pittsburgh hospital for neck pain then released, officials said. The driver was not hurt.