Moe police are investigating the unlawful assaults on two teenage girls on Tuesday afternoon near Moe railway station.
Two sisters on their way home from Trafalgar schools, aged 16 and 13, were attacked by a group of four or five female youths between the ages of 14 and 16 about 4.30pm.
Constable Campbell MacInnes said two of the female offenders were allegedly wearing Lowanna College uniforms and were not known to the victims.
Const MacInnes said a group of male youths crowded around watching the attack.
Moe railway station footage is currently being examined by police to identify the parties involved.
If you have any information in relation to the incident, phone Crime Stoppers on 1800 333 000 or Constable MacInnes on 5128 1100.