As pressure builds against Prime Minister Najib Abdul Razak, many are expecting his deputy, Muhyiddin Yassin, to step up to the plate and say something, anything, about his boss, positive or otherwise.

However the deputy premier chose to keep silent, and did not utter a single word at a breaking fast function with the media at the Utusan Malaysia headquarters today.

"I know this will disappoint the media, but there will be no speech or press conference by the deputy prime minister tonight," the emcee said upon Muhyiddin's arrival.

Muhyiddin instead spent his time before breaking fast shaking hands and taking selfies with the press, but remained tight-lipped.

There have been calls for Muhyiddin to take over the government temporarily, and for Najib ( photo ) to go on leave or resign.

This is after allegations surfaced that almost RM2.6 billion had been deposited into Najib's personal accounts.

Malaysiakini has reported that three out of six bank accounts frozen by authorities in relation to a probe on 1MDB today, belonged to the prime minister.

Muhyiddin has said that the allegations against Najib should be investigated .

However he did not say whether his boss should stay in office during the probe.