ST. LOUIS (KSDK) - An accident in north St. Louis has sent four people to the hospital.

The accident happened in the 7300 block of Hall Street shortly after 4 p.m. when two vehicles hit head-on.

Hall Street is closed at this time, but expected to reopen soon.

All four patients have non-life threatening injuries.

Police say they do not know yet what caused the accident.

KSDK