Dr Mahathir Mohamad has branded Deputy Prime Minister Ahmad Zahid Hamidi a "kaki pembohong (liar)" with regard to the latter's claim of having seen a copy of the former premier's identity card.

He also dared Zahid to produce the said identity card, which purportedly stated his name as "Mahathir a/l Iskandar Kutty".

"This (Zahid's statement) is good enough to show that Zahid is a 'kaki pembohong'. A 'kaki pembohong' because he cannot show the blue-coloured identity card," he said.