Polish police have arrested a 29-year-old woman they suspect is responsible for a hit-and-run fatality after a mechanic found part of a human body part jammed in the under carriage of her car, Warsaw police said.

"Many traces, including human tissue, were found in the under carriage of the BMW," a policce statement said.

A source close to the investigation told AFP a mechanic had found the nose of the victim jammed in the frame of the woman's car.

Police said a 28-year-old man fell victim to a hit-and-run by the woman Monday night on a small road in the Warsaw area. The man died after she fled without offering him any assistance.

She told mechanics at the garage where she took her car for repairs that she had hit a deer.

The garage notified police when a mechanic making repairs on the car found the human body part jammed in its under carriage.