What caused the closure of the Agia Sofia metro station?
Smoke was detected inside the Agia Sofia station of the Thessaloniki metro at 00:25 on 18 September 2026. All fire safety systems activated immediately. For precautionary reasons the prescribed safety protocols were applied without delay. THEMA, the operator, stated that the incident was caused by the failure of a compensation capacitor located in a technical area. On-site inspection by technical crews and the fire service confirmed this equipment fault as the source. The source material specifies that the capacitor was in a technical space and that no other cause was identified.
How long will the station remain closed?
THEMA announced that the station will stay closed until restoration work is finished and all required technical and safety inspections have been carried out. No reopening date was given. The operator emphasised that these steps are necessary to guarantee passenger safety before services resume. The station remains closed specifically to complete the restoration works, the foreseen technical controls and the safety checks.
What actions were taken immediately after the smoke was found?
Standard safety procedures were followed at once. The station was evacuated, the fire service was notified and line operations were adjusted accordingly. Technical teams together with firefighters conducted checks that identified the capacitor failure in the technical space as the cause. THEMA confirmed that all fire safety systems responded immediately and that the established safety protocols were implemented for preventive reasons.
Which other stations or lines were affected?
The source material reports no impact on any other stations. Only the Agia Sofia station was closed. Service adjustments were made solely to keep the remainder of the Thessaloniki metro network running. No information was provided about effects beyond this single station.
Frequently asked questions
Was anyone injured?
No injuries were reported in connection with the incident.
Was there a fire?
THEMA described the event as smoke caused by equipment failure rather than an active fire.
Where can passengers find updates?
THEMA issues updates through its official channels. Travellers should check those sources for the latest service information.
