A pair of Caldwell County residents were injured in a head-on collision on Highway 13 near Polo Wednesday morning.

According to the highway patrol, Richard Williams, 71, of Cowgill, was northbound when he crossed the center line and hit Jacqueline McCormack, 59, of Polo.

Williams refused treatment at the scene for minor injuries.

McCormack was moderately injured and transported to Cameron Regional Medical Center.