New Delhi, April 20 -- The US has cracked down on Pakistan's ballistic missile programme by sanctioning four companies from China and Belarus that provided critical components especially for the region-destabilising long-range missiles.The US Department of State said it has sanctioned Belarus-based Minsk Wheel Tractor Plant which allegedly supplied special vehicle chassis to Pakistan's long-range ballistic missile programme being implemented by its National Development Complex (NDC).

China-based Xi'an Longde Technology Development Company, it said, has supplied a filament winding machine to produce rocket motor cases for ballistic missiles.Another Chinese company, Tianjin Creative Source International, supplied stir welding equipment whi...