Two people were charged Thursday morning with murdering a Greenville man and seriously injuring his daughter in her Greenville apartment early Tuesday.

Ronald Victor Machado, 21, of Jamestown, and Krystle S. Weaver, 20, of Fowler, Ohio, are charged with homicide, attempted homicide, conspiracy to commit homicide and burglary, said Mercer County District Attorney Robert G. Kochems.

Machado told police he and Ms. Weaver attacked Thomas Lorigan, 44, of 183 Ray Road, Greene Township, and Heather Turk, of 94 Clinton St., Apartment 103, when the father and daughter returned from the store, according to the police complaint.

Ms. Weaver stabbed Ms. Turk with a knife in the head and Machado stabbed Lorigan with the same knife in the head. Ms. Weaver and Machado threw the knives away and drove off. Ms. Weaver and Machado had previously been roommates of Ms. Turk and authorities are still looking into possible motives for the crime, Kochems said.

Machado is being held in Trumbull County Jail on a parole detainer and was expected to be served with an arrest warrant Thursday afternoon, Kochems said.