RAWALPINDI: The Pakistan Army troops will perform only Quick Reaction Force (QRF) duties in case of any law and order situation arising during the polling of by-elections in Punjab. The Army troops carried out reconnaissance of the most sensitive locations in respective areas as 3rd tier responders to any law and order situation in line with directions of Election Commission of Pakistan during Punjab by-elections, an Inter Services Public Relations (ISPR) news release said here on Saturday.