BETHLEHEM, Pa. -

An unmarked Bethlehem police vehicle flipped onto its roof after being involved in a hit-and-run accident early Saturday morning, officials said.
It happened at about 12:30 a.m. Saturday at 25th Street and William Penn Highway in Palmer Township, Northampton County, police said.
Two officers were on their way back from Northampton County Prison when their vehicle was hit by another car,  police said.

The police vehicle then slammed into a telephone pole and rolled over.

The officers weren't seriously injured.

The case is under investigation.