ScotRail said it had cancelled trains at Glasgow Queen Street as emergency services were dealing with “an incident” near the station.
It said: “Until the police deem it safe to run trains again, no trains will run into and out of Glasgow Queen Street High Level.”
Glasgow Royal Concert Hall, also on Killermont Street, said it had cancelled performances due “circumstances beyond our control”.
Police Scotland said three men had been arrested in connection with the incident and inquiries were ongoing.
Station operator Strathclyde Partnership for Transport (SPT) apologised for the disruption and said passengers would be updated when it reopened.
Stagecoach, First Bus, McGill’s and several other bus firms use the station.
First said that “multiple services are diverting” and bus operators were using other city centre streets for drop offs and pick ups.
Citylink, which runs longer distance buses, said its services would depart from North Hanover Street until further notice.
Passengers have been urged to check with operators on how services have been affected.
