Authorities on Tuesday identified the motorist who was killed in a crash caused when a suspected impaired driver crossed into oncoming traffic after dark in Plymouth and killed a driver heading the other way.

Frank J. Fischer, 59, of Watertown, died in the collision of pickup trucks, which occurred about 6:25 p.m. Thursday on southbound County Road 101 just south of 24th Avenue N., according to police. Fischer died at the scene.

The 32-year-old motorist whose northbound vehicle strayed over the centerline was taken to North Memorial Health Hospital with noncritical injuries.

"There were possible signs of [alcohol or drug] impairment, and we are waiting for test results," police spokeswoman Tammy Ward said.

Police said the surviving motorist is from Plymouth, but they are declining to release his identity.