Disruption to train services between Ipswich and Felixstowe is expected to last for the rest of the day.
Greater Anglia warned passengers to expect cancellations to services following a train fault.
The rail operator announced: "Train services running to and from these stations have been cancelled. Disruption is expected until the end of the day.
"Due to a fault with the train running on the Ipswich to Felixstowe branch, we are unable to operate a train service.
"Greater Anglia and Network Rail are sorry if your journey has been affected by this disruption."
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