Major rail disruption has hit parts of the Netherlands, including Amsterdam, following suspected sabotage of the tracks, according to the country's railway infrastructure operator.
ProRail warned passengers in the country's center and north to expect cancellations and delays on Tuesday. The closure of some level crossings could also cause disruption to roads.
Local media reported that pipes were attached to the tracks in multiple locations. In a statement, ProRail said the incident appeared to be "an intentional disruption... caused by human action."
No suspects or motives have been identified, but the national police unit is investigating. The BBC has contacted the police for comment.
The network's website showed at least 15 disruptions across the country on Tuesday, affecting routes to the main international airport, Schiphol, and Utrecht.
Train operator Nederlandse Spoorwegen said services around Zwolle, Deventer, and Amersfoort were disrupted. The operator added that the disruption was so extensive that it was "not possible" to provide a bus replacement service.
A Eurostar train from Amsterdam to Paris was also delayed due to "operational restrictions" at Amsterdam Centraal on Tuesday, though it was unclear if this was linked to the wider disruption. The BBC has contacted Eurostar for further information.
ProRail stated: "Materials were found at multiple locations in the track that were deliberately placed there. This causes section malfunctions. Sabotage appears to be involved."
Footage published by Dutch public broadcaster NOS on Tuesday showed police carrying what appeared to be metal pipes, about 1.5 meters (5ft) long, away from railway tracks at Veenendaal in the central Netherlands.
ProRail reported that one train in the city of Steenwijk struck one of the objects, but there were no injuries.
The disruption in the Netherlands occurred after separate reports in French media suggested a derailment in Normandy on Friday could have been an act of sabotage. Prosecutors stated that a section of rail found on the track may have caused the crash. However, France's interior minister Laurent Nunez urged caution while an investigation is ongoing, saying authorities are pursuing all leads.
