The State Patrol said Monday that it is looking for a car and its driver in connection with a suspected hit-and-run on a Minneapolis interstate over the weekend that left a motorcycle passenger dead.

The crash occurred about 10:45 p.m. Saturday on Interstate 94 at Franklin Avenue, the State Patrol said. A Harley-Davidson was heading east on I-94 and hit a car from behind, the patrol said.

Both people on the motorcycle were thrown to the pavement, and passenger Ann E. Warner, 40, of St. Paul, died at the crash site, according to the patrol. Neither had on a helmet at the time, the patrol noted.

The motorcycle's operator, Jerry Lynn Phillips, 53, of St. Paul, was taken to HCMC with severe injuries, the patrol said. Phillips was in critical condition as of midday Monday, a hospital spokeswoman said.

Phillips "was switching lanes and struck the back of [a] black sedan at a high rate of speed," read a search warrant filed Monday that cleared the way for the patrol to collect blood from him to be tested for illicit drug use.

A social media posting by the patrol said it is looking for a black Chevy Impala, model year ranging from 2006 to 2013, with a damaged rear bumper. The patrol added that the driver also was being sought but had no description to offer.

"The vehicle has a bumper sticker on the left rear bumper," the posting read. Anyone with information about the crash is urged to contact the patrol at 763-279-4559.