He was with a friend outside a service station on Albert Street, Sebastopol, south of Ballarat, when an argument took place with another two men around 3am. The victim, from Sebastopol, was assaulted before the two men fled the scene. "The teenager was taken to the Ballarat Base Hospital but has since been airlifted to The Alfred hospital in a critical condition," Victoria Police spokeswoman Kelly Yates said. "An 18-year-old man from Sebastopol is currently assisting police with their enquiries," she added. Anyone with information is urged to contact Crime Stoppers 1800 333 000 or visit www.crimestoppers.com.au