LODI, Wis. -

The Wisconsin State Patrol is investigating a single-vehicle crash Friday night involving a Columbia County sheriff’s deputy, officials said.

Emergency crews responded around 9 p.m. to the eastbound lanes of Highway 60 at McGowan Road and Smokey Hollow Road near Lodi, according to a release.

A Columbia County deputy was headed to a domestic disturbance call involving a juvenile and his parents on Pine Hollow Road around 9 p.m., officials said.

The 40-year-old deputy was driving on McGowan Road when he approached an intersection with Smokey Hollow Road, according to a release. The squad car traveled through the intersection and into a private driveway until it collided with a tree.

Officials said the deputy was transporting his K-9 partner at the time of the crash. The K-9 was not injured in the crash.

The deputy was taken by Med Flight to UW Hospital with life-threatening injuries, officials said. He was wearing his seat belt at the time of the crash.

The crash remains under investigation.