About a third of 27,000 motorcycles affected by a scheme designed to persuade owners to scrap their old, pollutive two-wheelers have been deregistered, a year after the incentive was announced.

In response to queries from The Straits Times, the National Environment Agency (NEA) said more than 8,300 out of the 27,000 such motorcycles had been deregistered or scrapped at the end of last month.