On September 10, 2026, the Société de transport de Montréal (STM) confirmed that subway service on the Green line resumed after a temporary shutdown caused by an emergency services intervention. The interruption began when emergency personnel entered the system, prompting an immediate suspension of train operations on the line.
The Green line, which forms part of Montreal's four‑line subway network, was the only route affected by the incident. STM officials worked in coordination with municipal emergency services to secure the affected stations and tracks, ensuring that safety protocols were followed before trains were allowed to run again.
Emergency responders took control of the situation, and their presence required the line to be closed to passengers while the necessary checks and procedures were completed. The STM released statements indicating that the agency prioritized passenger safety and that all required inspections were conducted before service was restored.
During the shutdown, passengers who had planned to travel on the Green line were directed to alternative routes, including the remaining three subway lines and surface transit options. While the exact duration of the interruption was not disclosed, service on the Green line was reported as back in operation later in the day, allowing commuters to continue their journeys on the network.
The STM reiterated its commitment to monitoring the situation and maintaining safe conditions across the entire subway system. No further details about the cause of the emergency intervention were provided at the time of the announcement. The restoration of Green line service marks the conclusion of the incident that temporarily disrupted a key component of Montreal's public transit infrastructure.