A 13-year-old girl was struck and killed by a tractor trailer Tuesday, as she was heading home after wrapping up her last day of school, police said.

According to police, Aniya Williams was crossing North Goethals Road to board a city bus, when she was hit by the truck at around noon.

Witnesses say the tractor-trailer had a green light and was not going that fast when the accident occurred.

Ernest Eans, 55, is a retired correction officer in the area who said students tend to run across the intersection in order to catch a city bus home.

"It was bound to happen sooner or later," Eans told the New York Post. "There's no crossing guard."

An off-duty EMT saw the accident while he was stopped at a nearby Sunoco gas station. He rushed to the victim's aid and continued to talk to her while he and others attempted to pull her from under the truck.

Williams, a student of Staten Island School for Civic Leadership in Graniteville, was taken to Richmond University Medical Center where she died a few hours later.

The driver of the truck was detained by police at the scene and an investigation is underway.