A metro train derailed near the Bostancı station on June 19, 2026, due to a switch malfunction, resulting in injuries to three passengers and significant transit disruptions. Emergency teams, including fire and health personnel, responded to the scene on the M4 Kadıköy–Sabiha Gökçen Havalimanı line to evacuate passengers who were forced to exit the train and walk through the tunnel.
What happened during the evacuation?
Passengers reported a lack of communication and power failures during the incident. Dilek Kaygalak, a passenger on the train, stated that the electricity cut out and doors did not open initially, forcing commuters to open them manually. Ayten Yücel, another passenger, noted that the train moved in reverse before striking a wall, causing intense shaking and panic among those on board.
Why the lack of information matters
The absence of clear directives during the emergency heightened passenger distress, according to witness accounts. Passengers described navigating through dark tunnels without guidance, with some being instructed to change directions after walking for extended periods. Orhan Çoban reported that the signal was lost abruptly, leaving commuters to find their own way out of the tunnel in a state of panic.
What is the current status of the line?
Recovery efforts are ongoing at the site as of June 19, 2026. Istanbul Provincial Health Director Abdullah Emre Güner confirmed via social media that numerous 112 Emergency Health teams and UMKE personnel were deployed to provide medical support and coordinate with relevant institutions. While the Maltepe-Sabiha Gökçen segment remains functional, commuters are likely to face continued delays and congestion near the Bostancı bridge bus stops until the line is fully cleared and safety checks are completed.
Frequently Asked Questions
What caused the metro to derail?
According to reports, the derailment at the Bostancı location was caused by a switch malfunction.
How many people were injured?
Three people were injured in the incident and were transported to nearby hospitals after receiving initial intervention from health teams at the scene.
Is the entire M4 line closed?
No, service is currently suspended only between the Kadıköy and Küçükyalı stations, while trains continue to operate between Maltepe and Sabiha Gökçen Havalimanı.
How do you believe public transit authorities should improve emergency communication for passengers trapped in tunnels?