In a press statement issued on Tuesday, the States police said the boy was attacked near the bus stop next to the largest car park in the bay between 8 pm and 8.30 pm last Wednesday.
He ran to Pizza Express for safety and the fight was broken up by a passing female motorist.
The woman or anyone else with information is being asked to phone the States police on 612612 or Crimestoppers on 0800 555 111.
