TEHRAN — A group of hard-line Iranian news media organizations says it has raised $600,000 to add to a bounty for the killing of the British novelist Salman Rushdie.

Iran’s former supreme leader, Ayatollah Ruhollah Khomeini, issued a fatwa, or religious edict, in 1989 calling for Mr. Rushdie to be killed because of his book “The Satanic Verses,” which the ayatollah found to be blasphemous and insulting toward Muslims. Mr. Rushdie has since then been living largely out of sight and under the protection of bodyguards.

The semiofficial Fars news agency, one of the organizations involved, reported that the new reward money was gathered during a trade fair called the Islamic Republic’s Digital Media Exhibition. It quoted the secretary of the exhibition saying that the $600,000 had been announced last week to mark the anniversary of the 1989 fatwa.

The Iranian government distanced itself from calls for Mr. Rushdie’s death under former President Mohammad Khatami, a reformist who declared in 1998 that the fatwa had ended. But the religious authorities said it could not be withdrawn by anyone other than Ayatollah Khomeini, who died four months after issuing it. His successor, Ayatollah Ali Khamenei, said in 2005 that the fatwa remained valid.