Rail passengers going through Eastleigh are facing major delays after signalling problems on the line.
South West Trains said the issue meant trains were unable to run through Eastleigh.
It has affected trains between Southampton and Winchester, and from Eastleigh to Hedge End and Romsey.
Many passengers' journeys were expected to be extended by up to an hour with shuttle buses being brought in to replace trains.
The problem was not expected to be resolved until after 11:00 BST.
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