TEHRAN — In a sign of further tension between regional rivals, Iran will not allow its citizens to travel to Saudi Arabia for the annual Muslim pilgrimage to Mecca in September, Iran’s state television reported on Sunday.

The decision, which means that tens of thousands of Iranians cannot make their spiritual journey to the main pilgrimage site of Islam, came after several failed rounds of talks between officials of both countries and on the heels of accusations that Saudi Arabia has started a cyberwar against Iran.

Iran’s culture minister, Ali Jannati, told state television that “no pilgrims would be sent to the Muslim holy sites of Mecca and Medina, because of obstacles created by Saudi officials.”