Services to and from Glasgow Central train station have been disrupted this evening.
ScotRail have confirmed that a bull on the line to be the cause of the disruption.
The incident has forced the closure of the rail line between Bishopton and Paisley St James.
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As a result, services between Glasgow Central and Wemyss Bay and Gourock are currently affected.
ScotRail took to Twitter to alert rail users of the disruption, tweeting: "The line between Bishopton and Paisley St James is currently closed due to a bull on the railway.
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"This will cause disruption to services between Wemyss Bay, Gourock and Glasgow Central."
Disruption is expected to last until around 22:30 this evening.