KHAN GARH - Pakistan Democratic Party Chairman (PDP) Nawabzada Mansoor Ahmad Khan has accepted the invitation of Pakistan Tehreek-e-Insaf Chief Imran Khan regarding participation in the PTIs third sit-in scheduled for June 25 at MCC ground in Nawan Sher area Multan. The PDP willingly accepted the invitation and will attend the sit-in along a number of his party workers to raise voice against American drone attacks in tribal areas and subsequent killing of innocent people.