Former premier Najib Abdul Razak has urged Economic Affairs Minister Mohamed Azmin Ali to clear the air on whether he met Singaporean senior officers to discuss the Kuala Lumpur-Singapore High-Speed Rail (HSR) project.

"Azmin had said something that was contradicted by the Singapore ministry (of transport).

"In terms of international diplomacy, this is very serious. You have to tell the truth," he told reporters at the Parliament lobby this afternoon...