Hackers successfully compromised an Israeli webcast of the first Eurovision semi-final, which was interrupted to show a fake missile alert in host city Tel Aviv.

The cyberattack took place on Tuesday on the website of the national broadcaster Kan, which was interrupted on Tuesday evening with a fake alert from Israel’s army telling of an impending missile attack.

Kan blamed terrorist group Hamas for the attack, and it comes after Israel last week carried out a military airstrike in response to an attempted Hamas cyber attack.

It is thought to be the first time that a nation-state had retaliated with physical military action in real time against a cyber attack.

The Israel Defense Force (IDF) said last week that it had “removed” the building where “HamasCyberHQ.exe” had been based.

That airstrike came after Hamas had fired roughly 700 rockets into Israel, and four Israelis and 25 Palestinians were killed during the fighting.

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