BANNU/ KOHAT- Pakistan Tehreek-e-Insaf (PTI) chief Imran Khan today threatened to file a murder case against Prime Minister Nawaz Sharif, if violence was used against his party workers during the August 14 rally. Talking to journalists Imran Khan demanded the Army should not support the government and stay neutral. He reiterated that PTI will challenge the imposition of Article 245 in the Supreme Court. He said that Punjab Chief Minister Shahbaz Sharif has contacted him and agreed to meet his demands which included answers to: 1) Who scripted the victory speech of Nawaz Sharif on May 11, 2013; 2) What was the role of caretaker Punjab chief minister Najam Sethi; 3) What was the role of the then-chief justice Iftikhar Muhammad Chaudhry; 4) And lastly why returning officers were not put in place under the Election Commission of Pakistan. PTI chief said that he could ask Pakistan Awami Tehreek (PAT) chief Tahirul Qadri to become a part of his 'tsunami march,' however, he said he does not agree with his 'revolution' agenda. In response to the ongoing rumors of Interior Minister Chaudhry Nisar Ali Khan considering to join the ranks of PTI, Imran said his party's doors are always open for Nisar as he is the only person in Pakistan Muslim League- Nawaz (PML-N) who is not a "darbari." Imran arrived in Bannu as promised to celebrate Eid with internally displaced persons (IDPs) of North Waziristan. While addressing the IDPs, the PTI chief at first apologized for not being able to offer Eid prayers with them because of bad weather. He said that his party and the Khyber-Pakhtunkhwa government will do everything they can for people affected by the ongoing military operation in North Waziristan, adding that the entire nation is standing by them as they go through these difficult times. Condemning Sindh and Punjab governments' decision to stop IDPs from entering their provinces, the PTI chief remarked that the IDPs were Pakistanis and were allowed to go to any part of Pakistan, further stating that it was their constitutional right. He said that the entire nation shares the hardships of internally displaced persons (IDPs) of North Waziristan.