Baloch Raaji Aajoi Sangar (BRAS) an umbrella organization of Baloch armed groups claimed responsibility for shooting down the low-flying Pakistan military helicopter on Monday.
Former Prime Minister and Pakistan Tehreek-e-Insaf Chairman Imran Khan had announced the long protest march earlier this month, demanding the dissolution of the National Assembly and a date for the next general election.
Shehbaz Sharif, who has served as the chief minister of Pakistan's Punjab province, has good ties with the Pakistan Army, unlike his brother Nawaz Sharif.