SEOUL, May 2 (Xinhua) -- Two subway trains collided in Seoul on Friday afternoon, injuring around 200 passengers, Seoul's fire department said on Friday.
One train of Subway Line 2 ran into the back of another that stopped between stations because of mechanical problems near Sangwangsimni Station at around 3:32 p.m. local time.
The injured passengers have been taken to the nearby hospitals. Most of them have light ankles or feet injuries, officials said. But one of the two train drivers suffered a fractured shoulder. Some of the passengers have been cured and went back home.
Dozens of fire vehicles and ambulances have been sent to the station, officials said. Two cars of the train were derailed as a result of the collision and passengers walked on the tracks to the station.
Service on Subway Line 2 was partly restricted after the accident. Local government has sent more buses and taxis to areas near the station.
It will take at least four to five hours to finish the urgent repair of the train, Seoul Metropolitan Government said, adding a total of 159 workers are at the scene for repairing operation.
The Ministry of Land, Infrastructure and Transport has set up a central crisis center and sent railway safety inspectors to the scene.
Seoul Metro, the operator of the subway, said it was the first time in South Korea that subway trains had collided.
Officials of Seoul Metro said both trains are being driven manually. The train in front was approved to stop there to check its problems, but the back train didn't keep the safe distance and rammed into the rear end of the front one after making a sudden brake.
Officials said a failure in the following train's automatic distance control system might be the cause of the collision, but the exact cause of the accident is still under investigation.