"There are a large number of injured and we have fatalities," Tekirdag governor Mehmet Ceylan said.
Twenty-four people were killed when a train derailed in northwest Turkey this weekend, Deputy Prime Minister Recep Akdag said on Monday, a sharp jump from the previous toll of 10.
The state-run Anadolu news agency quoted Akdag as saying search operations this morning had now been completed at the wreck of the train, which derailed early Sunday evening in the Tekirdag region while heading towards Istanbul.
Over 100 ambulances have been sent to the scene, TRT Haber said, quoting Health Ministry Undersecretary Eyup Gumus. The Turkish army said in a statement that it had sent helicopters to the scene.
Television pictures showed several train carriages laying on their sides, and shocked injured being taken away on stretchers.
"There are a large number of injured and we have fatalities," Tekirdag governor Mehmet Ceylan told the NTV channel. "The accident happened because of adverse weather conditions," he added.
Reports said the surrounding area was muddy due to recent rains.
President Recep Tayyip Erdogan has been informed over the accident and expressed his condolences over those who lost their lives, state-run Anadolu news agency said.
Turkish authorities under Erdogan have over the last years sought to modernise Turkey's once ramshackle rail network, building several high speed inter-city lines.
The train involved in the accident appeared to be one of the slower passenger trains travelling on a single track railway.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)