MOOSE, Wyo. — A grizzly bear attacked and seriously injured a man in western Wyoming’s Grand Teton National Park, prompting closure of a mountain there Monday.

The grizzly was one of two that surprised the 35-year-old man from Massachusetts on Sunday afternoon on Signal Mountain. Rescuers flew the injured man by helicopter to an ambulance that drove him to a nearby hospital.

He was expected to recover, park officials said in a statement, declining to identify him.

The statement did not…