At least eight people are dead and 11 injured after a driver barreled a rental pickup truck onto a bike path and slammed into pedestrians and cyclists in Lower Manhattan Tuesday afternoon, shouting "Allahu akbar," law enforcement sources tell Fox News and The Associated Press.

Police tweeted that one person - who police shot - has been taken into custody and is expected to survive. Police added that there are "no others outstanding."

Witnesses who were in their classroom at a nearby high school described the scene.

"It was really chaotic," one student said, adding that she saw at least four mangled bicycles lying on the ground.

Another student said when they looked out of their classroom window, they could see victims on the ground, still uncovered.

"You just see the dead bodies just laying there," she said.

Watch more above.