With just hours to go before the Paris Olympics opening ceremony, France's high speed rail network has been hit by so-called 'acts of sabotage'. Some customers have been left unable to make the journey across the Channel due to the disruption, with others severely delayed. The London to Paris operator, Eurostar, has warned a quarter of services will be cancelled over the weekend - with many others diverted. Report by Covellm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn