The leader of the Palestinian Hamas militant group, Ismail Haniyeh, was killed in Tehran along with one of his bodyguards, Iran's Revolutionary Guards said on Wednesday, July 31.

"The residence of Ismail Haniyeh, head of the political office of Hamas Islamic Resistance, was hit in Tehran, and as a result of this incident, him and one of his bodyguards were martyred," said a statement by the Islamic Revolutionary Guard Corps's Sepah news website.

On Tuesday, Haniyeh attended Iran's new president's swearing-in ceremony.

This is a developing story.