A Greek government statement says that Papandreou has postponed his planned visit because of developments in Egypt. No alternate date for the visit has been set.

The top leadership body of Egypt's ruling party, including Mubarak's son Gamal, resigned Saturday.

Papandreou has consulted by phone on Saturday's developments in Egypt with the prime ministers of Turkey, Recep Tayyip Erdogan, and Israel, Benjamin Netanyahu, as well as Palestinian Authority President Mahmoud Abbas.

Greek Prime Minister George Papandreou announced in Brussels on Friday night that he would be travelling to Cairo on Sunday.

Speaking to reporters at the end of a one-day special summit of EU leaders on energy, innovation and economy, Papandreou said that he would be holding meetings with Egyptian political leaders.

The Greek premier also held telephone conversations on Friday with Egyptian President Hosni Mubarak and figurehead Mohamed ElBaradei.

Papandreou underlined the special interest Greece places on Egypt, as the latter "is in our neighbourhood".

In parallel, the Greek premier drew attention to the possible danger of an "explosion of a refugees wave towards Greece" in the case tragic events in Egypt continue.

He said he had the opportunity to discuss on Friday developments in the north African country with Hosni Mubarak and Mohamed ElBaradei and other Egyptian personalities. He added that he also held telephone contacts with U.S. Secretary of State Hillary Clinton and Russian Foreign Minister Sergey Lavrov, and that he informed Catherine Ashton, High Representative of the European Union for Foreign Affairs and Security Policy, on his Cairo visit on Sunday.

Ashton will also visit Cairo, following Papandreouβs visit, after a relevant EU summit decision.