Ajmal Naqshbandi, a freelance journalist and translator, was kidnapped along with Daniele Mastrogiacomo of the Italian daily La Repubblica, and a driver in southern Helmand province on March 5. The driver, Sayed Agha, was beheaded, and Mastrogiacomo was released March 19 in a much criticized swap for five Taliban militants.
The Taliban made a similar demand in return for the release of Naqshbandi.
"We asked for two Taliban commanders to be released in exchange for Ajmal Naqshbandi, but the government did not care for our demands, and today, at 3:05 p.m., we beheaded Ajmal in Garmsir district of Helmand province," said Shahabuddin Atal, who claimed to be a spokesman for regional Taliban commander Mullah Dadullah, known for his cruelty.
"When we demanded the exchange for the Italian journalist, the government released the prisoners, but for the Afghan journalist, the government did not care," Atal said, but his claim could not be independently verified.
Interior Ministry spokesman Zemeri Bashary said that police have no evidence yet that Naqshbandi has been killed.
Another Taliban spokesman who frequently speaks with the media, Qari Yousef Ahmadi, said he was not aware of the killing.
Tom Koenigs, the U.N.'s special representative to Afghanistan, condemned the murder and called on authorities to bring those responsible for Naqshbandi's death to justice.
"The perpetrators of this crime have shown absolute indifference to the value of human life by ignoring the calls of family, journalists and Afghans who with one voice called for his safe return," Koenigs said in a statement. "The rights of journalists to go about their work, free from interference or harm, should be recognized and respected by all."
La Repubblica's editor, Ezio Mauro, said in a statement on the paper's Web site that the newspaper staff was "living through hours of anguish" after news of the purported execution of Naqshbandi.
"The interpreter did nothing wrong, he's a man who, like Daniele and Sayed, went into that area only for reasons of work," the statement said.
The prisoner swap that secured Mastrogiacomo's release has been heavily criticized by Afghan lawmakers and foreigners working in Afghanistan as an incentive for more militant kidnappings.
President Hamid Karzai on Friday defended the exchange, saying the case was threatening Italian Prime Minister Romano Prodi's government. However, he ruled out further swaps.
"The Italian prime minister called me several times and asked for cooperation from our side," Karzai said. "The Italian government was facing collapse."
The Taliban have also claimed that they kidnapped two French workers from the aid group Terre d'Enfance and their three Afghan staff. The five, who were based in southwestern Nimroz province, went missing last week.
Nimroz Gov. Ghulam Dastagir Azad said Sunday he had no news from the kidnappers or the five missing persons.
Last month, local Taliban commander Mullah Tur Jan said the group kidnapped five Afghan medics on March 27, in volatile Kandahar province. The group demanded that Taliban prisoners be exchanged for the release of the medics. There have been no reported developments since then.