Sergei Yakovlev said: "No concrete agreement [on the meeting] has been reached."
He added that Russian, U.S., EU and UN representatives will discuss preparations for the event in Brussels March 12-13.
Yakovlev said the representatives of the Middle East Quartet will also attend an international meeting on the elaboration of a permanent mechanism of economic aide to Palestinians in Brussels March 12-13.
Representatives of Israel and Palestine are expected to attend the ministerial meeting, but Yakovlev said he does not know who will represent the conflicting sides.
On February 21, the Quartet of Mideast mediators failed to agree in Berlin on a coordinated approach to the Palestinian-Israeli conflict, and put off any decision regarding aid to the Palestinian Authority until its next meeting.
Since the Islamist group Hamas came to power in Palestine, Western nations have blocked aid to the Palestinian government over its refusal to recognize Israel's right to exist, give up violence and comply with previous Palestinian-Israeli agreements seeking a solution to the protracted Middle East crisis.
The meeting of the Quartet in Berlin did not change Washington's position on those issues, just as with the previous meeting in Washington in early February, and U.S. Secretary of State Condoleezza Rice once again expressed Washington's concerns over a government that includes the militant Hamas party.
She questioned how it was possible to speak of peace when one side did not recognize the other side's right to exist, referring to Hamas' refusal to recognize Israel, and stressed once again the U.S. position that any Palestinian government must recognize Israel to obtain its support.
The greatest obstacle to the peace process, Rice said, was the lack of a fully formed national unity government in Palestine, although progress was made earlier in the month between the country's two conflicting parties.
Palestine was on the brink of civil war as the country found itself torn between the Fatah movement, led by President Mahmoud Abbas, and the Islamist group Hamas, which won parliamentary elections in January 2006 and is regarded by the U.S. and Israel as a terrorist organization.
At a February 8 meeting in Mecca, Hamas and Fatah reached an agreement on the structure of a new power-sharing Cabinet. Although the agreement ended weeks of fighting between the opposing groups, in which over 90 people died on the both sides, Hamas still refuses to recognize Israel and renounce violence, both preconditions for the resumption of international aid.
Russia, which has also called on Palestine to recognize Israel and give up violence, has been pushing for the Quartet to recognize the Palestinian coalition deal reached in Mecca, and has taken a softer stance on Hamas, unlike the United States.
