Fort Worth Engine 42, Burleson Truck 2, Rescue 2, MedStar EMS, and Police are working a major accident with reported entrapment on East FM 1187 / Rendon Crowley Road just east of I35W. At least two ambulances responding. One patient with serious to potentially critical injuries. Battalion 1, Squad 2, and Quint 17 all responding to assist. Avoid this area.