An investigation into a shooting prompted officials to close the 60 Freeway in the Diamond Bar area Wednesday morning.

Officers were called to investigate reports of a car-to-car shooting near Diamond Bar Boulevard around 11:30 p.m. Tuesday night, the California Highway Patrol confirmed.

Officials were forced to close both directions of the 60 Freeway at the 57 Freeway and close a portion of the southbound 57 at the 60 to conduct their investigation.

A driver of a pickup truck who pulled over in a parking lot told authorities that someone had shot at his vehicle.

No injuries were reported but video showed what appeared to be a bullet hole in the vehicle.

It was unclear how long the freeway would remain closed. Delays for drivers headed westbound were already stacking up by 4:30 a.m.

The best alternate for drivers headed westbound appeared to be the 10 Freeway.

Investigators later determined that the gunman then shot at a white sedan, killing one man and wounding another person. The driver fled to Costa Mesa before calling authorities.

Further details on that shooting can be found here.