Accident w/ Entrapment (Collin County)

Melissa FD, Collin County EMS, and multiple law enforcement are on scene of a major accident with entrapment in the 2400 block of McDonald St (Highway 5) in front of the Dollar General, just south of Melissa proper. Extrication is in progress. Anna FD and McKinney FD both requested to assist. Air medical has been launched to the scene.