"Brother, leader, mujahid Ismail Haniyeh" is how Hamas, the Islamist militant group responsible for the October 7 attacks on Israel, described their political leader when they confirmed his death in an airstrike in Tehran, Iran's capital, on Wednesday.

Although he lived in exile in Qatar, Haniyeh was one of the most visible Hamas leaders during the war in Gaza.

Discover how he became the political face of the militant group, one Israel, the US, the EU and others deem a terrorist organization.