A state trooper escaped injury after a semitrailer struck his squad on a St. Paul highway Wednesday night. Now the Minnesota State Patrol is asking for the public’s help to find the driver who left the scene.

As snow fell about 9:25 p.m., the trooper had his squad’s emergency lights activated and was pulling up behind several vehicles that were crashed on westbound Interstate 94 at Mounds Boulevard.

The semi side-swiped the squad car and kept going. The State Patrol said on Thursday that the semi is red and has damage to the front passenger side, and the semi’s trailer is white.

Anyone with information, including vehicle dash cam footage, is asked to call the State Patrol’s east metro dispatch at 651-582-1509.