Israel's 197,000 b/d Haifa refinery has halted operations after a missile strike by Iran damaged its power supply over the weekend of 14-15 June, operator Bazan said.
Bazan had initially continued processing crude after the attack while shutting some secondary units. But it has now shut all units, citing significant damage to the power plant that supplies electricity to the refinery complex. The site also produces petrochemicals.
The company said it is working with state utility Israel Electric Corporation to restore power to the site.
Israel has no domestic crude production, leaving Bazan reliant on imports to supply the refinery. The country's only other refinery is in Ashdod, with a capacity of 84,000 b/d.
Other energy infrastructure targeted since the conflict started late last week includes two key gas treatment facilities and oil storage tanks in Iran. Israel has also taken its Leviathan and Karish gas fields offline as a precaution.