A woman in her 20s, walking near the Dennington oval, was robbed and thrown to the ground on Saturday afternoon.
Detective Senior Constable Richard Hughes, of the Warrnambool police crime investigation unit, said at about 1.30pm the 23-year-old victim was walking along Dennington's Station Street.
"The victim was walking by the Dennington Recreation Reserve when she saw a man on the opposite side of the road walking towards her," he said.
"The victim smiled at the man and continued walking.
"The man has then crossed over the road, walked towards the victim and as the man approached he said: 'Give me your wallet'.”
The police officer said the woman victim was so shocked she said: “What?”
He said the offender then repeated his demand, this time in an angrier tone.
"The victim handed over her wallet as she didn't want to make the offender any more angry," Detective Senior Constable Hughes said.
"The offender has then grabbed the woman by the shirt and threw her onto the road."
The detective said the woman’s head hit the road surface, leaving her feeling sick, dizzy and with blurred vision.
"The offender has then fled from the area," the police officer said.
"The man is not known to the woman. He is described as caucasian, wearing a red jumper and being taller than the victim."
The woman had about $100 in her purse and identification.
She attended at the Warrnambool Base Hospital for observation, assessment and treatment.
Detective Senior Constable Hughes requested that anyone in the area who may have seen the offender, or who has information about the robbery, to contact the Warrnambool police station or Crime Stoppers on 1800 333 000
"There were a number of people playing and spectating at the cricket at Dennington on Saturday afternoon and these people may seen something of interest to the investigation," he said.