MINGORA (Reuters) - Taliban have beheaded two government officials in the northwestern Swat Valley in revenge for the killing of two insurgent commanders by security forces, a militant spokesman said on Sunday. The two government officials were kidnapped and beheaded on Saturday evening in Khuwaza Khela, a village 18 km north of the valleys main town of Mingora, said town police chief Danishwar Khan. Their bodies were dumped beside a road. They beheaded the officers. Weve sent an ambulance to pick up the bodies, Khan said. Militant spokesman Muslim Khan said the beheadings were revenge for the killing of two low-level Taliban commanders earlier on Saturday. AFP adds: Taliban militants shot dead an Afghan national in Pakistans restive northwest tribal belt after accusing him of spying for the United States, a police official said Sunday. The bullet-ridden body of Fazal Haq, 28, was found on Sunday dumped by the side of a road in Naurak village, 15 kilometres east of Miranshah, the main town in the semi-autonomous North Waziristan tribal region. Haq, who was kidnapped two months ago, had multiple bullet wounds on his body, local tribal police official Omar Niaz told AFP. A note written in Pashto language and found on Haqs body said: He was killed because of spying for the US against the Taliban. Almost every week, militants kidnap and kill tribesmen, accusing them of spying for the Pakistani government or US forces operating across the border in Afghanistan, where Taliban fighters are leading an insurgency.