Tekirdag governor Mehmet Ceyhan said the area where the derailment happened was muddy and hard to reach.
Around 24 people have been killed and more than 300 injured after a passenger train derailed in Turkey, officials said today.
Health Ministry Undersecretary Eyup Gumus told local media more than 100 ambulances were sent to the scene.
The transport ministry said the accident occurred after the railway track slipped from its original position because of torrential rainfall. "The accident happened because of adverse weather conditions", he added.
The train overturned near a village in Tekirdag province.
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Turkish officials say multiple cars of a train have derailed in the country's west, causing an unknown number of deaths and injuries.
President Recep Tayyip Erdogan's office said he had received information from the ministers of transport and interior about the incident, and sent condolences for those killed.
According to reports, the train was travelling from Uzunkopru to Instanbul and came off the rails in the Tekirdag Corlu district. "It was a frightful accident", DHA quoted her saying.
Turkey's audiovisual authority RTUK later said the government had issued a temporary ban on broadcasting images from the scene.
Turkey's rail network has been hit by several fatal accidents over the last years.
An overturned train vehicle is seen near a village at Tekirdag Province, Turkey, on Sunday, July 8, 2018.