Picture of Hassan Nasrallah in a festival.

Lebanon-based Shiite terror organization Hezbollah denied the death of its leader, Hassan Nasrallah, Tuesday amid reports that he had been flown to Tehran to undergo cancer treatment.

The rumor of his death spread quickly on social media site Twitter, where purported screen shots of the Hezbollah-affiliated website Al Manar announcing Nasrallah’s death were posted. Hezbollah said the photos had been doctored, with the organization calling them a “cheap forgery.”

Monday a report emerged from Lebanese radio station the Voice of Lebanon that Nasrallah had been flown to Tehran for emergency medical treatment for severe cancer-related complications.

A different report from Lebanon claimed that Nasrallah had been flown to Iran after he was wounded in an attack by Syrian rebels during a meeting he was attending.

The reports were attributed to “senior Hezbollah officials,” but there were no official confirmation of the reports from any other source.

According to the reports, Nasrallah’s deputy, Naim Kassem, has assumed command of the terrorist organization.