BLISSFIELD, Mich. (AP) -- A 38-year-old Ohio man has been charged in the fatal shootings of his ex-girlfriend and her sister and the wounding of their mother in southeastern Michigan.

A search for Thomas Fritz, of Sylvania, Ohio, that began over the weekend is ongoing.

In a news release Monday, the Michigan State Police say Fritz faces two counts of open murder and one count of assault with intent to commit murder in Lenawee County.

He's accused of killing 24-year-old Lisa Gritzmaker, 33-year-old Amy Merrill and their mother, 52-year-old Robin Lynn McCowan, were shot late Friday night in Blissfield, about 20 miles northwest of Toledo, Ohio. Police found the women at a home after responding to a 911 call from one of the victims.

McCowan is hospitalized.