The Islamic State claimed responsibility on Thursday for the bombing attack that killed 84 people in Kerman, Iran, on Wednesday, according to a post on the extremist group’s official Telegram account.

On Telegram, the group called it a “dual martyrdom operation,” and described how two militants approached a commemoration ceremony at the tomb of Major General Qassim Suleimani and detonated explosive belts strapped to their bodies “near the grave of the hypocrite leader,” referring to General Suleimani. The general, a widely revered, and feared, Iranian military and security leader, was assassinated four yeaérs ago in an American drone attack.

The Islamic State announcement dovetailed with American intelligence assessments, which indicated that the attack was most likely the work of the Islamic State, according to four American officials, as well as with assessments by regional military officials.