At least one person has been seriously injured as a result of an accident in Fairview Township.
The call came into the Butler County 911 Center just before 2 p.m. for a crash in the 100 block of Aspen Road.
Crews from Petrolia were among those responding to the scene to find a vehicle rollover and at least one person in need of medical treatment.
A helicopter was called to land in the area of Hooker Road near Karns City. The extent of injuries and cause of the crash are unknown at this time.