At 1700 hrs today CCSO deputies came across a serious MVC with entrapment at the intersection of Rousby Hall Rd and Rt-4. Deputies immediately called for assistance from Solomons, St-Leonard, and CALS. M101 (PMIC Polling) and Chief10 responded and assisted with the care of 3 injured patients. All patients were transported to a nearby landing site to be flown to area trauma centers.