A MAN who allegedly robbed a porn shop in Melbourne’s outer east is believed to have returned to the store five minutes later to make some purchases.

Police arrested a 20-year-old man after the robbery at the Main St shore in Lilydale last night.

A man wearing a balaclava entered the adult entertainment store at about 9.15pm and demanded cash.

He fled with money and cigarettes before it is alleged he returned five minutes later to buy goods from the same staff with the stolen cash.

Protective Services Officers at Lilydale train station tipped off police after seeing a man matching the description of the culprit.

Charged with theft, the man was bailed to appear at Ringwood Magistrates’ Court on June 30.