An armed man opened fire at the Mausoleum of Ayatollah Khomeini in southern Tehran at 10:00am (MSK) and wounded a number of people, the semi-official Fars news agency reported.
The identity and the motivation of the assailant was still unclear, Tasnim said.
One of the attackers who targeted Khomeini's tomb was a woman. She blew herself at the famous shrine, says reports from local media.
Another attacker at the Khomeini shrine dead. Reports say he killed himself by consuming cyanide.