Two men were shot and killed early Tuesday near 16th and McKinley streets in central Phoenix, and police were searching for a suspect who they believe left the scene. Multiple callers reported gunfire shortly before 5 a.m., Phoenix police Sgt. John Buchanan said. Officers found both men dead at the scene, south of Interstate 10. Investigators initially considered whether there might be a third victim, but Buchanan said none was found. Police said there was no known threat to the public. A police helicopter circled the Garfield neighborhood as officers searched for the suspect. Sixteenth Street was closed between Roosevelt and Washington streets as investigators documented the scene, looked for surveillance video and canvassed for witnesses. The closure was expected to last until early afternoon Tuesday. Police asked anyone with information to contact Silent Witness at 480-WITNESS, or 480-TESTIGO for Spanish speakers.