A man wanted in the killings of an elderly Ohio couple and in armed robberies in three states has been arrested in Arizona.

An FBI spokeswoman in Cleveland says 29-year-old Robert Clark was arrested Thursday by the Mohave County sheriff's office in Kingman after a high-speed chase. Arrested with him was Tabatha Hazel, who is a suspect in the armed robberies but not in the killings.

A third companion fled and is still being sought by authorities.

Clark has been charged with murder in the deaths of 88-year-old Doyle Chumney and his 79-year-old wife, Lillian. Their remains were found inside their torched car on a country road Jan. 22, the day after they were reported missing from their home.