Philadelphia police have released the names of two young men gunned down this week in Olney and South Philadelphia.Wednesday morning, a 20-year-old man with multiple gunshot wounds was found on a sidewalk in the 500 block of Geneva Avenue in Olney. He was Andre Tyler of the 100 block of East Walnut Park Drive in the city’s Oak Lane section, police said. He was pronounced dead at the scene at 8:17 a.m. Police believe an argument played a role in the shooting. The other homicide victim -- one of four people, including a pregnant woman, shot Tuesday night -- died of his wounds Wednesday morning. Adib Smith, 24, of the 2600 block of Earp Street in the King Village section of South Philadelphia, was pronounced dead at 1:08 a.m. at a hospital.