Police are urging two witnesses to contact police following a robbery in Forest Lake on Sunday 15 February.
Around 4.30pm, two teenage girls allegedly filled a trolley with alcoholic beverages and left a store in a Forest Lake shopping centre.
The store assistant managed to grab the trolley outside the store.
One of the girls allegedly swung a glass bottle at the store assistant but missed.
Two bystanders intervened and the girls fled on foot towards Forest Lake Boulevard.
The store assistant was not physically injured during the incident.
Investigators are seeking to speak to the two bystanders to assist with their ongoing investigation.
If you have information for police, contact Policelink by providing information using the online suspicious activity form 24hrs per day at www.police.qld.gov.au/reporting or call 131 444.
Report crime information anonymously via Crime Stoppers. Call 1800 333 000 or report online at www.crimestoppersqld.com.au.