ISLAMABAD, Pakistan (CNN) -- Pakistan's ambassador to Afghanistan went missing Monday and is feared to have been abducted in Pakistan's tribal region, according to Afghan security sources.

Envoy may have been abducted after Mullah Mansoor Dadullah, brother of Taliban commander in Afghanistan, was captured, sources said.
Sardar Tariq Azizuddin has not been heard from since he headed to the Afghan capital of Kabul from Pakistan, Foreign Ministry spokesman Mohammad Sadiq said.
Sadiq said the ambassador disappeared somewhere along the Kabul-Turkham highway, but offered no further details. The spokesman said the foreign office is working to discover Azizuddin's whereabouts.
Afghan security sources said Azizuddin went missing near the village of Ali Masjid in Pakistan's North West Frontier Province, about 7 km (4 miles) from the Afghan border.
The sources said he never reach the border as expected and his possible kidnapping may be a reprisal for the capture earlier in the day of Mansoor Dadullah.
Dadullah is the brother of Taliban leader Mullah Dadullah, who was killed last May in a military operation in southern Afghanistan.
Pakistani security forces on Monday shot and wounded Dadullah, a well-known Taliban operative in southwestern Pakistan near the Afghan border, Pakistani authorities said.
Pakistan's mountainous tribal region has a strong presence of al Qaeda and Taliban fighters. E-mail to a friend ![]()
CNN's Zein Basravi in Islamabad and journalist Farhad Peikar in Kabul contributed to this report.

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