SINGAPORE, Feb. 14 -- Singapore's Land Transport Authority (LTA) reportedly said it is working with rail operators SMRT and SBS Transit to improve incident response and determine the "root causes" behind three separate MRT service disruptions within five days.

The Straits Times (ST) reported LTA saying in a statement yesterday recounted that rail services were delayed on February 7, 10, and 11 at the North-South, North East and Circle MRT lines, though the incidents were unrelated.

On February 7, an engineering vehicle broke down at a railway crossing in Bishan Depot at 5.15am after completing maintenance works. When SMRT attempted to move it using a rescue train, some wheels came off the rails, blocking train departures from the depot. ...