Because of ongoing security problems in Pakistan, foreign governments advise against all travel, or all but essential travel, to many parts of the country. Your travel insurance may be invalid if you ignore this advice. Because of the risk of political violence, foreign visitors are required to travel with an armed escort in some areas. Seek up-to-date information on the security situation in areas you plan to visit before traveling to Pakistan.
https://www.lonelyplanet.com/pakistan