Ismail Haniyeh, the chief of Palestinian resistance group Hamas, has been killed in Iran, according to a statement from Hamas and Iranian officials.

Hamas said its leader was killed early on Wednesday following an Israeli raid targeting his residence in Tehran.

In a statement, the group mourned the death of Haniyeh, 62, who it said was killed in “a treacherous Zionist raid on his residence in Tehran after participating in the inauguration ceremony of the new Iranian president.”

Haniyeh, a prominent figure in the Palestinian political and resistance group, has been a key figure before and during Israel’s genocidal war on besieged Gaza.

The Iranian government announced an investigation into the killing, with results expected to be released soon.