The Oklahoma State Bureau of Investigation says three suspects are in custody following the fatal shooting of a man at a southwestern Oklahoma apartment building.Investigators say 26-year-old Nathan Morrow was shot and killed early Friday following an altercation at an apartment complex in Cache, about 85 miles southwest of Oklahoma City. Investigators say Morrow was pronounced dead at the scene.OSBI says investigators have arrested three suspects in connection with the fatal shooting. Records at the Comanche County Jail on Sunday showed that 19-year-old Devon Julian Cannon, 20-year-old Shannon Marshawn Freeman and 19-year-old Bre'lon Kyle Tylan Johnson are each being held on first-degree murder complaints. The records don't indicate whether they are represented by an attorney.Investigators haven't released details about the fatal shooting, including a motive.