Army says one killed as Indian troops open fire across de facto border while three others killed in North Waziristan.
Pashtun leader, who has led protests against state atrocities, says his demands are in line with the constitution.
United in grief after a high-profile police killing, followers of a young activist have joined marches across Pakistan.
An FIR has been registered against Manzoor Pashteen, who organised rallies highlighting profiling of Pashtuns.