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Rail services were delayed after a train struck an iron bar on the line near Barming this afternoon.
Train operator Southeastern reported the line was blocked following the incident, just after 2.45pm.
The train was checked for damage and was able to move towards London Victoria by 3.20pm, but the London-bound line between Maidstone East and Otford line remained blocked while the rails were checked for damage.
It was later confirmed there was no damage to the rails, as the iron bar came into contact with the power supply.
Southeastern confirmed the line was reopened just after 4pm, and services were able to run normally between Ashford, Maidstone East, and Otford.