MNA Mohsin Dawar was sent on remand to Peshawar Central Prison on Friday.
Dawar, a central Pashtun Tahaffuz Movement (PTM) leader, had been booked under various charges, including murder, attempted murder, terrorism and interference in official affairs after the May 26 Kharqamar checkpost incident in North Waziristan.
Although he had fled immediately after the incident, the PTM leader later surrendered himself to the district administration.