Rage attack at Melbourne petrol station

A woman has scratches on her arm after being attacked by another woman through her car window at a Melbourne petrol station for taking too long to pay.

Police say a 32-year-old woman returned to her car with her three-year-old son last Friday when a woman in a car behind her began hurling abuse, saying she had taken too long to pay.

The offender, who was captured on CCTV, then jumped out of her car and grabbed the victim by the arm through her car window, scratching her as she tried to drive away.