LOWELL, Ind. (AP) _ Five relatives, including a baby girl, were found shot to death in two houses Friday in what authorities were investigating as a murder-suicide.

A husband and wife and their 30-year-old son were discovered dead at one home, Sheriff John Buncich said. At the second home, the son's wife and baby daughter were found slain. The victims' identities were not released.

A shotgun found at the first home was probably used in the shootings, Buncich said.

Investigators were trying to determine the motive for the slayings.