Hackers linked to Israel have struck at Iran's biggest steel plants as tensions run high in cyberspace.

A major cyberattack has hit the Iranian steel industry today, with hackers claiming to have taken control of systems at three state-owned companies. The incident may be the latest salvo in the escalating cyberwar between Iran and Israel.

Khuzestan Steel Company confirmed on Monday morning that it had closed its plant “until further notice” due to technical issues caused by a cyber incident. Hacking gang Gonjeshke Darande, which has previously carried out attacks on Iranian infrastructure which have been linked to Israel, subsequently posted a video on Twitter, stating that it had hacked Khuzestan as well as two other steel businesses – the Moborakeh Steel Company and the Hormozgan Steel Company.