(CNN) Iran's Supreme Leader Ayatollah Seyyed Ali Khamenei on Monday accused Saudi Arabia and the United Arab Emirates of financing the perpetrators of Saturday's deadly attack on a military parade in Ahvaz and threatened to "harshly punish" the masterminds.

"According to the reports, this cowardly act was committed by the same people who are saved by the Americans whenever they are trapped in Syria and Iraq and whose hands are in the pockets of Saudi Arabia and the UAE," Khamenei said, according to his official website.

"We will certainly give the perpetrators of this act a harsh punishment," he added.

Iran's Intelligence Ministry issued a statement Monday saying it had identified the group responsible for the Ahvaz attack, the state-run Islamic Republic News Agency (IRNA) reported. The report did not name the group, but said that 22 people who it described as "supporters and involved in the incident" had been arrested.

On Sunday, Anwar Gargash, the UAE Minister of State For Foreign Affairs, said "official incitement against the UAE in Iran is unfortunate" and that "Tehran's accusations are baseless."

Read More