The Umno supreme council has decided that only party president Najib Abdul Razak will make a winding-up speech at this year’s Umno annual general assembly.

The move effectively bars Najib's opponents including Umno deputy president Muhyiddin Yassin and vice president Shafie Apdal from speaking, a first in the party's history.

“The decision has been made that only the president will make a wind-up speech,” Umno vice-president Ahmad Zahid Hamidi told the media after the party’s supreme council meeting in Menara Umno tonight.

Zahid added Umno deputy president Muhyiddin Yassin’s fate was not discussed in the meeting.

However he refused to give a definite answer when asked if Muhyiddin is still under a disciplinary probe.

“We will leave it to the secretary-general, Tengku Adnan Tengku Mansor, to make an announcement,” he said before walking off.

Muhyiddin’s position as Umno number two is hanging by a thread after he continued to voice out against Najib at an assembly in Kampung Baru on Monday.

Tengku Adnan said the speech would be thoroughly reviewed, and that action may be taken against Muhyiddin.

Muhyiddin was previously removed as deputy prime minister in July, for criticising 1MDB.