Manzoor Pashteen arrested in Peshawar and sent on judicial remand for 14 days.
Foreign media prominently covered his arrest as a high-profile rights activist but Peshawar police arrested on criminal and treasonous charges.
Meanwhile, Tahkal police station official Shiraz Khan had confirmed the arrest.
The cops produced PTM leader before a magistrate in Judicial Complex, Peshawar amid strict security arrangements.
Manzoor Pashteen arrested in Peshawar
The court will hold a hearing tomorrow to decide whether a transitory remand can be granted in order to move Pashteen to Dera Ismail Khan.
DI Khan City Police had registered a case (FIR) against him on January 18.
They booked him under section 506 (punishment for criminal intimidation) and 153-A (promoting enmity between different groups).
The police also framed him under section 120-B (punishment of criminal conspiracy), 124 (sedition), and 123-A (condemning the creation of the country and advocating the abolishment of its sovereignty) of the Pakistan Penal Code.
According to the FIR, Pashteen and other PTM leaders had attended a gathering on Jan 18 in DI Khan.
Pashteen had allegedly said that the 1973 Constitution violated basic human rights.
The FIR added that Pashteen also made derogatory comments about the State.
Police had also arrested nine other PTM workers identified as Muhammad Salam, Abdul Hameed, Idrees, Bilal, Mohib, Sajjadul Hassan, Aimal, Farooq and Muhammad Salman.