An Iranian rapper is facing death threats and has a $100,000 bounty on his head for a song that some say insults an Islamic Shiite imam.

Shahin Najafi, who sings in Farsi and lives in Germany, told the German website Qantara that the song "Naghi" is not about a religious figure but about the state of society in Iran.

"The story with 'Naghi' was just a pretext," Najafi said in an interview with Qantara, which the German Foreign Office funds to promote dialogue with the Islamic world.

"For me it is more of an excuse to talk about completely different things. I criticize Iranian society in the song. It seems as though people are just concentrating on the word 'imam,' " Najafi is quoted as saying.

Religious figures in Iran see it differently.

"Following the affront by rap singer Shahin Najafi against Imam Hadi (7th Imam of Shias) in a song called 'Naghi', his apostasy sentence has been issued by Ayatollah Safi Golpayegani," Iran's official Fars News Agency said in a website posting in Farsi.

Golpayegani is a grand ayatollah, which means the highest- ranking authority in Shiite Islam after prophets and imams. Being an apostate, or someone who forsakes Islam, is punishable by death under Iranian law.

"If the song contains any insults or indecency towards Imam Naghi, then it is blasphemy, and God knows what to do," Golpayegani, a 92-year-old Iranian cleric, is quoted as saying by Qantara.

A post on the blog entegham says Najafi should be sentenced to death.

"According to article 513 of Islam’s penal code: Anyone who insults the sanctity of Islam, anyone of the great prophets, the Imams, and Sadigheh Tahereh (the prophet’s daughter) should be executed," the post says.

The Iranian website Shia-Online.ir is offering $100,000 to anyone who kills Najafi. The money is being put up by "a philanthropist" in a Persian Gulf state, the website says.

In a blog post on Najafi, The Guardian in the UK calls Najafi "the Salman Rushdie of music," a reference to the author of "The Satanic Verses," who was given a religious death sentence by Ayatollah Ruhollah Khomeini in 1989 after Khomeini said Rushie's book was blasphemous.

But writing in the state-run newspaper Kayhan, columnist Sadollah Zarei says Najafi's case is different from Rushdie's, according to a New York Times report.

"This fatwa does not represent the government of Iran,” Zarei is quoted as saying. “This is done by a religious group in our society.”

Nevertheless, Najafi told Qantara he has taken "precautionary measures."

"We do, after all, live in a country where there are rules and procedures for such predicaments. So there is nothing to worry about," he told Qantara.