Australia’s political parties have been targeted by a “sophisticated state actor”, according to Scott Morrison, as part of a breach of the Parliament House computer network.

The head of the Australian Cyber Security Centre, Alastair MacGibbon, says agencies were unsure what material had been taken in the incident because the rapid remediation efforts has removed some of the forensic evidence.

The prime minister confirmed that state-sponsored intrusion in a statement to parliament on monday, but said there was no evidence of electoral interference and measures had been put in place to “ensure the integrity of our electoral system.”