Rail services between Folkestone and Dover were suspended after two unexploded bombs were found near a railway station.
Bomb disposal experts were called after maintenance workers made the discovery close to Dover Priory, Kent, at about 10:16 GMT, on Wednesday.
Southeastern services were suspended for about an hour while army experts dealt with the devices.
The operator's high-speed rail services were also diverted for a time.
Southeastern later posted an update on Twitter saying the Folkestone to Dover line had reopened.
A spokesman for British Transport Police (BTP) confirmed two devices had been found.