ISLAMABAD- The Federal Interior Ministry today called at least 3,000 additional troops from the Frontier Constabulary (FC) to deal with the Pakistan Tehreek-i-Insaf (PTI) and Pakistan Awami Tehreek (PAT) upcoming joint march towards the federal capital. The Interior Ministry sources said that a notification was issued after approval of Federal Interior Minister Chaudry Nisar Ali Khan. The FC works under the jurisdiction of the Interior Ministry. Apart from the FC, Islamabad would be heavily guarded due to presence of Pakistan Army's 111 Brigade commandos, Rangers, elite force, police and thousands of intelligence agencies' personnel. Earlier, the federal interior minister had announced the government's decision to call in the military to assist the civil administration in maintaining control of Islamabad from August 1 for a period of three months.