Subway service has resumed Thursday morning between Sheppard-Yonge and Eglinton stations on Line 1 Yonge-University, following an overnight closure prompted by the discovery of fireproofing material containing asbestos at track level.

The Toronto Transit Commission (TTC) confirmed crews worked through the night to clear debris and conduct lab testing to ensure air quality remained safe. Regular service resumed at 5 a.m.

Service was halted between Sheppard-Yonge and Eglinton stations at around 6:30 p.m. on Wednesday. At 7 p.m., the TTC said that maintenance crews had identified small pieces of fireproofing material between Eglinton and York Mills stations, some of which contained asbestos.

Service was suspended for the remainder of the evening, replaced by up to 80 shuttle buses.

“This

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