A burglar used a blood-filled syringe, filled with ''the virus'', to threaten two young shop staff during an armed robbery in a newsagent on the north side of the city.
The incident occurred in Centra on the New Cabra Road, at around 9.40pm Sunday evening.
According to Herald.ie, the suspect entered the shop, demanded money, then walked behind the counter, syringe in hand and told staff members that he had "the virus" before threatening to stab them.
The robber fled the scene with around €600 in cash.
No injuries have been reported.
The case is currently being investigated by Gardaí at the Mountjoy station, but have since had no arrests. The culprit is understood to have been wearing a black jacket, a grey tracksuit, and blue runners.