The Japanese manufacturer of a train that derailed in Taiwan, killing 18 people, said it has discovered a design flaw that failed to alert the central control system that an automatic safety feature had been turned off.

On Oct. 21, a train in the county of Yilan in Taiwan's northeast came off the rails on a curve while traveling at almost 149 kilometers per hour, nearly twice the speed limit, the head of a Taiwan government investigation team has said.

Eighteen people were killed and 187 injured in the island's worst rail crash in decades.