the diamir district is a first-order administrative division of the pakistani-controlled territory known as the northern areas and is the district in which the karakoram highway enters that territory from pakistan's khyber pakhtunkhwa. the capital of the diamir district is chilas. in 2004, the diamir district was reduced in size as a result of the creation of the new astore district from diamir's easternmost tehsil. (see map.)