NORRISTOWN, Pa. (AP) — Authorities say two men have died after they were found shot in a car that was in the middle of a Pennsylvania street.

It's not yet known what sparked the shooting in Norristown, which happened around 12:15 a.m. Monday.

Authorities say the car's passenger door was open when police arrived. One man was soon pronounced dead inside of the vehicle, while the other was taken to a hospital but died there a short time later.

The names of the two men have not been released.

Authorities declined further comment on the shooting, citing the ongoing investigation.