The Iowa State Patrol is investigating a crash that injured an Ionia woman in Butler County Monday morning (Sept. 18, 2017).

Authorities said Anna Schmitz, 42, was eastbound on Iowa Highway 3 when her sport utility vehicle crossed the center line and struck the rear dual wheels of a westbound semi tractor-trailer. According to an accident report, the semi was transporting liquid asphalt at the time of the crash. The tank, however, did not leak or spill.

Schmitz was transported to the Waverly hospital for treatment of undisclosed injuries. The semi's driver -- Lee Winter, 61, of Charles City -- apparently escaped injury.

The mishap occurred within the city limits of Shell Rock shortly after 6:30 a.m. on Monday.

According to the Iowa State Patrol, charges are pending in the accident.