UPPER SAUCON TWP., Pa. -

An accident at a busy intersection in Lehigh County sent four people to the hospital early Thursday morning.

The accident happened around 5:30 a.m. on Route 309, south of Route 378 South, in Upper Saucon Township.

Four vehicles were involved, said police, who have not yet determined what caused the crash.

Police also had no information about the conditions of the four people who were hospitalized.