Police are looking to make contact with two men they believe may be able to assist with an aggravated armed robbery investigation.
The incident unfolded just after 5am on Wednesday morning at the United service station in Lutana.
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Three teenagers, including two 17-year-olds and a 16-year-old, have been arrested and charged over the incident.
Police said the two men were customers at the business around the time of the robbery.
They described as wearing hi-vis work shirts.
“These men are asked to contact Glenorchy CIB on 131 444 or Crime Stoppers … with any witness information they have,” police said.