Two carriages of Bangkok subway collided at about 9:30 a.m. Monday, injuring more than 130 passengers.
Local TV and radio reports said the accident occurred at northeastern Bangkok near the Cultural Center station when a train preparing to leave the station collided with another one.
Over 130 passengers were injured as the accident happened at the morning rush hour.
The capital's public transportation administration has ordered the suspending of all subway trains.
Rescue officials said all passengers had been brought out of the underground train with the injured admitting to nearby hospital.
Initial investigation showed that one of the train which was under repair slid out of the repair station and collided with the other train.
Transport and Communication Minister Suriya Juengrungruangkit ruled out the accident has any link with terrorist attack.
After seven years of construction, the Bangkok subway began to operate in early July last year. The 20-km-long subway has 18 stations and can carry some 250,000 passengers each day.