The Gordon Street entrance to the station has been sealed off by officers following an incident at around 7.30pm.
Pictures show a heavy police presence and vehicles at the scene.
Police Scotland told Glasgow Live they had received a report of an incident.
They added that it was being dealt with by British Transport Police.
A spokesperson for Network Rail Scotland said the incident took place outside the Gordon Street entrance at around 7.30pm.
The spokesperson added that the Gordon Street entrance is shut but the station remains fully operational.
Express.co.uk has contacted British Transport Police for comment.
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