A powerful Iranian cleric — a member of the Assembly of Experts that selects the country’s supreme leader — has been killed in an armed attack, officials said on Wednesday.

“Ayatollah Abbas Ali Soleimani was killed this morning in an armed attack… the assailant was also arrested and is now being investigated,” IRNA news agency reported, citing the political and security official for the northern Mazandaran province where the attack happened.

The attack took place in a bank in the city of Babolsar, the official said.

“The motive of the assailant is not yet clear and will be announced after it is clarified,” the official added.

The governor of Mazandaran province Mahmoud Hosseinipour said the attacker was a local security personnel of the bank.

“So far, our information and documents indicate that this was not a security or terrorist act,” Hosseinipour told state television.

Soleimani, 75, was previously the representative of the country’s Supreme Leader Ayatollah Ali Khamenei.

He had also been the imam who led the weekly Friday prayers in the cities of Kashan, in central Isfahan province, and Zahedan in the southeastern province of Sistan-Baluchistan.

Under the constitution, the 88-strong Assembly of Experts is mandated with supervising, dismissing and electing the Supreme Leader.

The all-powerful deliberative body is now headed by ultra-conservative 96-year-old cleric Ahmad Jannati. Its members are chosen in popular elections for eight year-terms from a pool of candidates vetted by the country’s Guardian Council.

The attack is believed to be the most significant against a cleric in years in the country.

In April 2022, a suspected jihadist knife attack in the northeastern shrine city of Mashhad in Razavi Khorasan Province led to the death of two clerics and the injury of another.

The chief suspect, identified as Abdolatif Moradi, 21, was an ethnic Uzbek who had entered Iran illegally via the Pakistani border a year ago, Tasnim news agency said at the time.

Moradi was hanged in June in the same city on the accusation of “moharebeh”, or “war against God”.

The assailant had struck on the third day of the holy month of Ramazan as large crowds of worshippers gathered at the shrine of Imam Reza, one of the most revered figures in Shia Islam.

The attack in Mashhad came days after two Sunni clerics were shot dead outside a seminary in the northern Iranian town of Gonbad-e Kavus.