Authorities say a serial killer may be responsible for the stabbing deaths of five Flint-area men and wounding of eight others since May.

Flint police Lt. T.P. Johnson tells The Flint Journal that most of the victims have been older, slight-of-build black men. The suspect is white.

In some cases they have been asked for directions or told of car troubles before being attacked.

Johnson says he thinks the perpetrator is "hunting."

Ten attacks occurred in Flint, about 50 miles northwest of Detroit. Three others were in nearby communities.

The latest victim was found Monday. He's identified as 49-year-old Arnold Minor.

Police tell The Detroit News and Detroit Free Press the suspect is believed to be a muscular white man with light hair.