TWO men who are in hospital after a shooting at a Melbourne shopping centre car park knew each other, police say. A 45-year-old man, from Dandenong, was shot in the leg at the Keysborough shopping centre in the city's southeast at 12.30pm (AEDT) on Thursday. A short time later, another man turned up in hospital with facial injuries. Police say the two incidents are linked. Inspector Bruce Kitchen said the shooting was not related to bikie gangs but police were still trying to figure out why it happened. "We think it's probably a one-off incident," he told reporters at the scene. I'm not sure whether it's self-inflicted or not at this stage. The shot man's car was searched and armed crime detectives discovered a shotgun and several shotgun shells inside. Police do not believe there is anyone else involved in the incident.