Sydney teen glassed in Macca's brawl

A teenager has been glassed during a fight at a fast food outlet in Sydney's southwest.

The 15-year-old boy is in The Children's Hospital at Westmead with head injuries sustained at Bankstown McDonald's in the early hours of Sunday morning, police say.

He was found by emergency services officers who were called there on reports of a brawl.

A crime scene has been established and police have interviewed several people.