CHARLOTTE — Authorities in Charlotte say a 76-year-old woman who had been reported missing was struck and killed by a truck while walking in southbound Interstate 85.

Charlotte-Mecklenburg police said Shirley Pharr apparently had wandered about 3 1/2 miles from her home in northwest Charlotte when she was struck by two tractor-trailers early Wednesday morning.

N.C. Highway Patrol troopers say a motorist saw a woman walking northbound in the center southbound lane and went to the next exit to turn around in hopes of helping the woman. By that time, the trucks had struck Pharr, killing her instantly.

The truck drivers told troopers they couldn’t avoid striking the woman. The patrol says no charges will be filed in the case.