KUALA LUMPUR: The cause of the disruption to the Kelana Jaya Light Rail Transit (LRT) line's Automatic Train Control (ATC) has yet to be identified.

Prasarana's chief executive officer Mohd Azharuddin Mat Sah said there was a loss of signal between the operation centres and trains, and this prevented the trains from moving automatically between the Kelana Jaya and Ampang Park LRT stations.