Injury to popliteal aery in fracture lower end of the femur can be caused by

In distal third shaft fracture or supracondylar femur fracture, the distal fragment is tilted backward due to strong gastrocnemius pullThis posteriorly tilted distal fragment can cause popliteal aery injury (Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 125, 496)