Police in Oklahoma say they have arrested two brothers in the shooting deaths of four women at a Tulsa apartment complex last month.

Authorities say 39-year-old Cedric Poore and 32-year-old James Poore lived in the same apartment complex where the women were found. Officers wouldn't disclose a motive for the Jan. 7 killings, saying the investigation continues.

The brothers have not yet been formally charged.

Investigators believe the killings occurred during the daytime because someone had heard from one of the victims a few hours before the bodies were found at midday. Police say each woman was shot.

Police say Cedric Poore was already in the Tulsa jail on a traffic charge. James Poore was arrested Wednesday morning. Jail records showed no lawyers listed for the men.