1 person hurt in chain reaction crash in Kensington

KENSINGTON (WPVI) -- Philadelphia police are trying to figure out what caused a chain reaction crash in the city's Kensington section.

It happened around 8 a.m. Saturday near the intersection of Frankford Avenue and Tioga Street.

Police say a US Postal Service tractor-trailer and two cars were involved in the crash.

One of the cars was pushed onto the sidewalk and crashed into a wall.

One person suffered minor injuries from the crash.

It's still not clear who was at fault.