A multi-car pileup has sent at least four people to the hospital in Walnutport, Northampton County.

 It happened around noon Sunday on south Best Avenue, which is also Route 145.

Officials say all parties involved are expected to be okay.

Officials also told 69 News that there was a spill of some sort at the crash scene. That substance has yet to be identified.

Police are still working to figure out what caused the crash.