Two men were shot to death in an argument on a South Los Angeles street, police said. Tommy Moore, 37, and Michael Finn, 22, were found dead in the 600 block of West 77th Street, Lt. Otis Dobine said. Witnesses told police that the men had been arguing over something in the middle of the street when Moore pulled out a gun and shot Finn, Dobine said. A companion with Finn pulled out a weapon and shot Moore in retaliation, the witnesses said. Dobine said he did not know what the dispute was about. Detectives were questioning several people, but no suspect in Moore's slaying was in custody.