A significant police operation is ongoing in Manassas, Virginia, following a workplace shooting at United Rentals where three employees were critically injured. Authorities have identified the suspect, Marvin Grant, who is currently at large and considered a threat to the public. Residents have been advised to stay indoors as law enforcement conducts a statewide manhunt. The incident also led to nearby Jennie Dean Elementary School being placed under secure status. Police have released images of the suspect and are urging anyone with information to come forward as the search continues.