Islamabad, Aug 2 (Xinhua) Pakistani authorities have registered treason charges against a top pro-Taliban leader for making 'anti-state' remarks, officials said Sunday.

Sufi Muhammad, chief of the banned group Tehrik Nifaz Shariat-e-Muhammadi (TNSM), or movement for the enforcement of Islamic system, was arrested last month in Peshawar city.

Muhammad brokered a peace deal with the Pakistani government in February to set up Islamic courts in the Swat valley and several other parts of the North West Frontier Province (NWFP).

But the deal failed as Taliban in Swat refused to give up arms and the authorities said that Muhammad also violated the deal by not asking the Taliban to lay down arms.

The police in Saidu Sharif in Swat registered the treason case against Muhamamd for making a speech at a public meeting against the state organs in April, Sajid Muhmand, an official, said.