Malaysian Anti-Corruption Commission (MACC) chief commissioner Dzulkifli Ahmad's warning to corrupt politicians is pointless if it does not include "Malaysian Official 1", according to DAP veteran leader Lim Kit Siang.

"Was Dzulkifli directing his 'just you wait' warning to MO1, and if not, what credibility is there that the MACC will break the jinx of just going after anchovies while sharks continue to go scotfree, unlike the tigers of China and crocodiles in Indonesia are caught, brought to justice and jailed?" he asked in a statement.

The United States Department of Justice (DOJ) said a high ranking Malaysian government officer it dubbed "Malaysian Official 1" had received US$731 million which originated from 1MDB.

Cabinet minister Abdul Rahman Dahlan said MO1 is Prime Minister Najib Abdul Razak, but the fact that he is unnamed meant he is not the subject of the DOJ's legal action to recover assets worth more than US$1 billion believed to have been bought using funds siphoned from 1MDB.