A number of Israeli government websites went down on Monday in an apparent cyberattack. The websites of the interior, health, justice, and welfare ministries were taken offline, as was that of the Prime Minister’s Office.

Access to some of the sites has been restored. A defense establishment source claims that this is the largest-ever cyberattack carried out against Israel. They believe that a state actor or large organization carrying out the attack, but cannot yet determine who is behind it.

This is the largest-ever cyberattack carried out against Israel, a defense establishment source says Several Israeli government websites went down on Monday, prompting suspicions of a cyberattack. The websites of the Prime Minister’s Office, as well as several ministries, were inaccessible. Access to some of the websites has been restored.

A senior defense official reportedly told Haaretz that a cyberattack was carried out on Monday evening against government websites, hitting all websites using the .gov.il domain. The gov.il domain is used for all government websites except for defense-related ones.

This is the largest-ever cyberattack carried out against Israel, according to a defense establishment source. They have not yet determined who is behind the attack.

According to Haaretz, the defense establishment and the National Cyber Directorate declared a state of emergency to study the extent of the damage. They are checking government infrastructure, such as Israel’s electric and water companies, attempting to see if they were also attacked.