A group calling itself Afghanistan's Islamist Movement Fidai Mohaz claimed responsibility Wednesday for the murder in Kabul of Swedish Radio correspondent Nils Horner, whom it accused of being "a spy" for Britain's MI6 intelligence service.

Horner, a Swedish-British dual national, on Tuesday was conducting interviews in the Afghan capital accompanied by his driver and a translator when two unknown men approached and shot him in the back of the neck, Swedish Radio said.

The Islamist group, however, said in a brief communique that only one of its "heroes" participated in the attack that killed Horner.

"Nils Horner was not a reporter, but rather he was spying for MI6," declared Fidai Mohaz in a statement.

The Fidai Mohaz group was only recently created and its objectives are not yet known, several Afghan analysts told Efe.

After learning of Horner's murder, the Taliban denied any involvement.

The journalist, who earlier in his career had worked in London and New York, had been a correspondent for Radio Sweden in Asia since 2001 and lived in Hong Kong.

He had covered the fall of the Taliban regime, the entry of U.S. troops into Baghdad, the tsunami in Southeast Asia and the accident at Japan's Fukushima nuclear facility for Radio Sweden.

He traveled three or four times a year to Kabul, where he was covering events in the runup to the April 5 presidential election.

Attacks on foreign journalists are rare in Afghanistan, although kidnappings of reporters have occurred.

The NATO-led International Security Assistance Force is scheduled to leave Afghanistan at the end of this year. EFE