LAKE CITY, Minn. – A Kasson woman suffered life-threatening injuries in a two-vehicle collision on Highway 63 near 12th Street.  The State Patrol said that Trista Hager , 31, was  northbound in a Toyota Highlander and David Shafer, 58, of Clarkfield, was southbound in a Ford F-350. Hager was taken to Saint Marys hospital in Rochester. Shafer was treated for less serious injuries at the Lake City hospital. The accident happened about 4:15 p.m.