Iranian clerics have denounced Azerbaijan for hosting the upcoming Eurovision song festival and for allegedly permitting gay rallies, which are banned in Iran.
Baku, however, has never staged a gay pride parade.
The official IRNA news agency said Tuesday that a protest note was delivered to Azerbaijan's Ambassador Javanshir Akhundov.
Oil-rich Azerbaijan has nurtured close relations with the U.S. and played an active role in Western-led counter-terrorist programs. That foreign policy has placed a strain on its ties with Iran, which hosts a sizable ethnic Azeri community.