ALAMO TOWNSHIP, Mich. (WOOD) — A crash on US-131 involving over 20 vehicles has closed the southbound freeway in Alamo Township.

Around 2:45 p.m., the Kalamazoo County Sheriff’s Office said both directions of US-131 near the Ravine Road overpass were closed due to a crash. Just after 3 p.m., the northbound lanes reopened.

Over 20 vehicles are involved and there are injuries, a post on the sheriff’s office’s Facebook page said. The number of people hurt is unknown, but Michigan State Police said in a tweet that no serious injuries were reported.

Drivers are advised to avoid the area and seek an alternate route. The sheriff’s office said this will “likely be an extended closure.” Around 4:15 p.m., state police said that traffic was expected to be impacted for at least two hours.

An MSP patrol vehicle was damaged while policing the crash. The trooper was not injured. State police warned drivers passing through crash scenes to “please slow down & pay attention.”

It’s unclear how long traffic will be impacted or what led up to the crash.

The pileup is just one of many crashes in West Michigan caused by icy snowy roads.

This crash remains under investigation.