SINGAPORE, Oct. 10 -- A total of seven drivers were on Thursday caught for providing illegal cross-border taxi services at Singapore's land checkpoints.

The operation was mounted acting on regular tip-offs from the National Private Hire Vehicle Association and the National Taxi Association, said the Land Transport Authority (LTA) in a Facebook post the same evening.

According to Senior Minister of State for Transport Sun Xueling, a total of 5,400 vehicles has now been checked since July last year, with 254 vehicles impounded.

"We remain committed to taking firm enforcement actions against illegal cross-border service providers as such services undermine passenger safety and affect the livelihoods of our local point-to-point transport d...