By Steve Beck

PHILADELPHIA (CBS) – No children were on board when a school bus lost control and overturned in Philadelphia early Monday morning.

However, two adults were on board and were taken to the hospital for treatment.

The accident happened at about 7 a.m. on the off-ramp to Broad Street from the Roosevelt Boulevard.

According to investigators, the school bus was traveling in the northbound lanes when it apparently attempted to exit at the Broad Street off-ramp. The bus spun out of control and overturned before coming to a rest against a chain-link fence.

Police say a 50-year-old male driver was taken to Temple University Hospital to be treated for neck and back pain. A female passenger in her 20s was also taken to Temple and is listed in stable condition.

Fortunately, authorities say no children were on the bus at the time of the crash.

Traffic was snarled in the area for several hours as crews shut down the exit to the Broad Street off-ramp to clean up the crash.

The cause of the crash remains under investigation.

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