Beijing, China (CNN)Taiwan authorities are investigating what caused a train carrying 366 passengers to derail Sunday in Yilan County, northeastern Taiwan, killing at least 18 people and injuring 178.
Taiwan train accident: 18 killed when carriages derail
The train was traveling between the cities of Shulin and Taitung when it left the tracks on a coastal line popular with tourists just before 5 p.m. local time, according to the transport ministry.
All eight train carriages derailed in the incident, with five of those overturning.
Among the dead are eight people from the same family who were traveling back from a wedding in New Taipei city, according to CNN affiliate in Taiwan SET TV.
The cause of the derailment is still under investigation, but at a news conference Monday transport ministry officials said they were looking into speed as a possible factor, as well as a report filed by the driver 20 minutes before the incident that said the air pressure in the train's brakes was "too low."
Lai Sui-chin, vice chairman of the transport ministry's electrical engineering department, said that it appeared that pressure in the brakes was unstable before the derailment. He said there wouldn't be enough power to brake the train if the air pressure was too low.
Lai cautioned that further investigation was needed to determine whether this caused the accident.
The train entered service at the end of 2011 and had just finished major maintenance work, according to the head of the Taiwan Railways Administration, Lu Chieh-shen.