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Commuters in downtown Toronto experienced major delays Wednesday evening after a subway train got stuck in a tunnel on Line 1 earlier in the day.

Shuttle buses were brought in as service was suspended on Line 1 between Bloor-Yonge and Osgoode stations.

Shortly before 2 p.m., Toronto police tweeted that a train was stuck in a tunnel near Union Station and smoke was rising from the track area.

At the time, police said the incident may have occurred because a train hit a switch underground.

A spokesperson for Toronto Fire Services told Global News that the train had left Union Station and was heading to St. Andrew Station when the incident occurred.

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Photos posted to social media shows passengers walking through the subway tunnel as they were evacuated following the incident. No injuries were reported.

Shortly after 5 p.m., the TTC announced that full service had resumed on Line 1.