Pakistani police have arrested Sufi Muhammad, a radical cleric considered to be the political godfather of Taliban groups in the Swat region of Pakistan.
Muhammad brokered last February's ill-fated peace deal which allowed the Taliban to seize control of the Swat valley. The deal's collapse triggered an army attack in May.
An elderly, black-turbaned figure with a stern demeanour, Muhammad kept a low profile after fighting erupted. But in recent days he angered provincial authorities by holding public meetings.
"Instead of keeping his promises by taking steps for the sake of peace, and speaking out against terrorism, he did not utter a single word against terrorists," said Iftikhar Hussain, information minister for the North-West Frontier Province.
It was not clear what charges were being brought against Muhammad, who was taken into custody in Peshawar, in the north-west of Pakistan. Although his group, the outlawed Tehrik Nifaz-i-Shariat-i-Muhammadi, claims to be peaceful, two senior officials were detained during fighting. They later died when the army convoy they were travelling in was hit by a roadside bomb.
In late 2001 Muhammad gained notoriety after he led hundreds of Pakistanis, many of them untrained farmers, to fight US forces in Afghanistan. Many were killed and Muhammad was jailed on his return.
Last year the provincial government released him to help broker peace with the Swat Taliban, whose leader, Maulana Fazlullah, is his son-in-law.