ST. LOUIS COUNTY, Mo. – Authorities are investigating a murder overnight in Pine Lawn after one person was shot and killed.

It all unfolded around midnight on Jennings Station Road, south of I-70, near the intersection with Reichmann Avenue. Authorities with the North County Police Cooperative told FOX 2 that a man in his 20s was shot on Jennings Station Road. We’re told the victim ran after he was shot but collapsed in the backyard of a nearby home on Rosewood Avenue. That is just one street over from Jennings Station Road.

We saw multiple evidence markers at the scene and a medical examiner there as well. The evidence markers typically indicate shell casings. The victim was pronounced dead at the scene.

Police added that as they were investigating the shooting, multiple people started showing up at the scene, leading to a confrontation with authorities.

An officer in need of aid called, prompting a large response from officers in multiple departments. We have no reports of any officers being hurt. Investigators say at this point they have no suspects in the case.

We’re told detectives will return to the area later Thursday morning, canvassing the neighborhood looking for any clues. You are urged to call the police if you have any information.

FOX 2 will update this story with more information as it becomes available.