Below is the full text of the Quartet's statement.
Quartet Principals noted that recent events in Gaza and the West Bank make it more urgent than ever that we advance the search for peace in the Middle East.
The Quartet reaffirms its objective to promote an end to the conflict in conformity with the roadmap and expresses its intention to redouble its efforts in that regard.
The urgency of recent events has reinforced the need for the international community, bearing in mind the obligations of the parties, to help Palestinians as they build the institutions and economy of a viable state in Gaza and the West Bank, able to take its place as a peaceful and prosperous partner to Israel and its other neighbours.
To facilitate efforts to these ends, following discussions among the Principals, today the Quartet announced the appointment of Tony Blair as the Quartet representative.
Mr Blair, who is stepping down from office this week, has long demonstrated his commitment on these issues.
As Quartet Representative, he will:
mobilise international assistance to the Palestinians, working closely with donors and existing coordination bodies
help to identify, and secure appropriate international support in addressing the institutional governance needs of the Palestinian state, focusing as a matter of urgency on the rule of law
develop plans to promote Palestinian economic development, including private sector partnerships, building on previously agreed frameworks, especially concerning access and movement
and liaise with other countries as appropriate in support of the agreed Quartet objectives
As representative, Tony Blair will bring continuity and intensity of focus to the work of the Quartet in support of the Palestinians, within the broader framework of the Quartet's efforts to promote an end to the conflict in conformity with the roadmap.
He will spend significant time in the region working with the parties and others to help create viable and lasting government institutions representing all Palestinians, a robust economy, and a climate of law and order for the Palestinian people.
Tony Blair will be supported in this work by a small team of experts, based in Jerusalem, to be seconded by partner countries and institutions.
The Quartet representative will report to and consult regularly with the Quartet and be guided by it as necessary.
The Quartet looks forward to welcoming Mr Blair at its next meeting.
Tony Blair. Source :  Jens Olaf
Hier, le jour même de sa démission du poste de Premier ministre du Royaume-Uni et de son siège de parlementaire, Tony Blair a été nommé envoyé du   Quartet pour le Moyen-Orient. Le Quartet est composé des Nations unies, de l'Union européenne, des États-Unis d'Amérique et de la Russie.

Le Quartet a souligné les devoirs de Tony Blair comme envoyé dans une déclaration :


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