Former prime minister Dr Mahathir Mohamad was reluctant to comment on 1MDB today, claiming it was a crime to do so.

"I just want to warn you I can't comment on 1MDB because talking about 1MDB is now a crime," he said sarcastically to reporters at a press conference in Kuala Lumpur.

Asked if he had seen the leaked video where axed deputy prime minister Muhyiddin Yassin claims Prime Minister Najib Abdul Razak had admitted to receiving RM2.6 billion, Mahathir replied: "Yes"

"Yes, everyone has seen it. But Najib never denies receiving the money.

"But I'm not supposed to talk about that, it is now illegal. I didn't say anything, ya!"  he said.

Mahathir was speaking to the media after launching Prince Court Medical Centre's new liver centre in Kuala Lumpur.

It is believed that Muhyiddin was dropped from Najib's new cabinet because of his criticisms on the 1MDB fiasco.

The Edge Weekly and The Edge Financial Daily were also suspended for three months for writing exposes on 1MDB.

Mahathir also gave a sarcastic spin to a safe answer when asked how Abdul Gani Patail's removal as attorney-general would affect the special task force's investigations into 1MDB.

"Another AG also can investigate. We have a new AG and I suppose he will investigate.

"We also have the Public Accounts Committee now, without four members, so we'll wait until a new chairman is appointed, etcetera, etcetera, etcetera," he said.

Mahathir was referring to Najib roping in four PAC members into the government, including its chairperson Nur Jazlan Mohamed.

During his speech at the launch of the liver centre, the 90-year-old said one of the secrets to his longevity was that he did not smoke or drink.

Later, during the press conference, Mahathir joked that his old age also meant he doesn't have to donate organs.

"I'm too old. You don't want to put my liver into a younger person. I'm not donating anything," he quipped.

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