The additional charges faced by former premier Najib Abdul Razak is not related to 1MDB of the luxury yacht Equanimity, said his lawyer Muhammad Shafee Abdullah.

"I want to stress it (the charges) has nothing to do with 1MDB.

"It has nothing to do with the issue of the yacht that arrived in Port Klang yesterday," he told reporters at the Jalan Duta Court Complex lobby in Kuala Lumpur.

Shafee also questioned the timing of the charges levelled against his client this morning.

"I don't know why the timing is done this way (to coincide with the yacht's arrival)... Perhaps to confuse the issue," he said.

Earlier, Shafee explained that the three new charges under the Anti-Money Laundering, Anti-Terrorism Financing and Proceeds of Unlawful Activities Act (Amla) 2001 were linked to the four earlier charges which his client has claimed trial to.

The earlier chargers were related to SRC International Sdn Bhd - an insolvent former 1MDB subsidiary which was taken over by the Finance Ministry in 2012.

"Amla is a big word but (in this case) it strictly means proceeds of crime.

"For example, if someone receives a bribe for RM20,000 and then he takes this bribe money to deposit into his account, or he converts it to USD... those are money-laundering offences.

"If the main charges are dropped, then the Amla charges drop automatically," he added.

Coincidentally, the Equanimity superyacht linked to tycoon Jho Low had arrived in Port Klang from Batam yesterday.

It was handed over by Indonesian authorities who seized the vessel in February as part of the US Department of Justice's 1MDB-linked civil forfeiture suits.