A pickup truck with a frosted-over windshield rear-ended a Hopkins police car as officers were making a traffic stop Monday morning, slightly injuring the two officers in the squad car, authorities said.

The crash happened about 8 a.m. on Excelsior Boulevard, a block east of Blake Road.

Donis Miguel Angel Valenzuela, 34, was driving on a revoked license, said police Sgt. Michael Glassberg.

Damage to the squad car, whose emergency lights were operating at the time, was estimated at $10,000.

Glassberg said the law requires that front and side windows must be clear before putting a vehicle in gear.

Valenzuela was cited for driving on a revoked license, not having insurance and failure to use due care.