A planned closure for maintenance of the Mont Blanc tunnel between Italy and France will be postponed after an alternative Alpine route was disrupted by a landslide on the French side of the border, Italy's transport ministry said on Thursday. The 11.6 kilometre Mont Blanc tunnel had been due to close from next Monday for 15 weeks for works to be carried out. The delay was agreed by Italy's transport minister Matteo Salvini in agreement with his French counterpart Clément Beaune.