The African National Congress's (ANC's) Parliamentary caucus will meet on Thursday for a special caucus meeting.

The caucus was called for 10:00 following recent events in Parliament, including the postponement of the State of the Nation Address (Sona), ANC spokesperson Nonceba Mhlauli said.

The contents of caucus meetings however, will not be disclosed as they are closed meetings for members, Mhlauli added.

It is not usual for caucuses to sit before the Sona, usually considered the "opening of Parliament".

Reports are that ANC MPs will discuss its options ahead of an anticipated announcement from ANC president Cyril Ramaphosa on the future of President Jacob Zuma.

The announcement will have implications for the caucus if Zuma either resigns, or a recall is ordered. Parliament will have to convene a special sitting to remove Zuma if he does not resign. A new president will need to be elected in either scenario within 30 days.

ANC chief whip Jackson Mthembu could not be reached for further comment.

Ramaphosa on Wednesday said talks with Zuma about the "transition" are ongoing, and an announcement will only be ready in the coming days.

This, after the ANC announced its special NEC meeting planned for Wednesday had been postponed to February 17 amid reports of an agreement between the State and party presidents.

Parliament on Wednesday said there was still no proposed date for a Sona, as the issue is now being handled by the ANC leaders.

The budget speech, however, will go ahead on February 21 and - while not ideal - does not legally need to wait for Sona.