'Road rage incident' turns deadly as Virginia highway stabbing leaves 2 people dead; dog also killed

At least two people died Sunday in Virginia when a highway "road rage incident" reportedly spiraled into a violent mass stabbing, authorities said.

The attack occurred on I-495 southbound near Little River Turnpike in Annandale, Fairfax County, roughly 30 minutes from Washington, D.C.

One of four stabbing victims, as well as a dog, died from the incident, authorities said. The suspect was also killed when responding officers returned fire.

Officials said the attack does not appear to be terrorism-related.