ProRail, the Dutch government rail infrastructure agency, said multiple track sections across the Netherlands show materials that appear to have been deliberately placed; staff are removing the items. Since Tuesday morning services in the country’s central and northern regions have been severely disrupted; ProRail warned of delays and cancellations. Faults at multiple level crossings may affect road traffic, and during these segment faults signalling/computer systems can register a section as "occupied" even when no train is present.(金十)