A 90-year-old collector for the RSL has had donations stolen from him by three girls outside Coles on Albany Highway in Gosnells on Friday.

The man was sitting at a table when a woman walked over and grabbed a jar full of money.

The man attempted to run after her but tripped over a small concrete barrier, receiving minor abrasions to his hands and elbows.

The store manager saw the incident and gave chase however he was hit in the face with a purse by a second female offender and punched several times in the face by a third.

All three offenders are described as being dark skinned, aged between 16 and 20 years old.

Anyone with information should call Crimestoppers on 1800 333 000.