Ismail Haniyeh, head of the political bureau of Hamas, was martyred early Wednesday morning in an attack targeting him in the Iranian capital, Tehran.

Hamas said in a statement that an Israeli airstrike targeted Haniyeh and one of his personal bodyguards, leading to his death.

Meanwhile, the Iranian Revolutionary Guard said it was investigating the circumstances of Haniyeh's assassination at his residence.

The attack took place in a fortified area north of Tehran, and the exact location of the high-profile guests, whose visits to Tehran are usually kept secret, is not known.

The Iranian Revolutionary Guard regularly protects VIPs visiting Iran.

Haniyeh arrived in Tehran the day before yesterday on a visit whose purpose was to participate in the inauguration ceremony of the new Iranian President, Masoud Pezeshkian, whom he met privately yesterday, and also met with the Leader of the Islamic Revolution, Ali Khamenei.