Poker machines at Tasmania's two casinos have been offline since the Easter weekend due to a ransomware cyber attack.
Owner Federal Group was forced to shut down gaming machines at Hobart's Wrest Point and the Country Club in Launceston following an "incident" in the early hours of April 3.
The company confirmed on Tuesday the attack involved ransomware, a type of online attack that threatens to publish data unless a ransom is paid.
"As a result of hard work by our team and external experts, including over the Easter long weekend, the immediate incident itself has been contained," Federal Group said in a statement.
"The Australian Cyber Security Centre was notified and is co-ordinating relevant law enforcement agencies and continued forensic analysis.
"The incident is being actively investigated by Federal Group and external experts we have retained."
The attack has also affected Federal Group's hotel booking system.
"Our team has done an excellent job to ensure we have been able to continue serving customers and guests," the company said.
It is not known when gaming machines at the two venues will come back online.
Federal Group owns a monopoly on pokies in Tasmania but there is no indication that gaming machines outside the casinos have been affected.
