Israeli government websites were briefly downed on Thursday by a power cut at a server facility, a finance ministry official told AFP.
Boaz Stembler, a spokesman for the ministry which is responsible for government web services, did not say how long the stoppage lasted but that power was restored by 3:45pm (1345 GMT).
He denied the outage was the result of hacking.
"There was an electrical fault which has been repaired," he said, adding that the sites would be back online soon.
News website Ynet said that public government and military sites were affected by the outage, which occurred at the facility housing their servers.
Israeli politicians and security officials often warn of the dangers of hacking and say they have thwarted numerous attempted attacks.
Explore further: Hacking attack blamed for Network Solutions outage