BBC News with Zoe Diamond

President Obama says he and the Russian leader Vladimir Putin have agreed on the need to end the violence in Syria. Mr Obama said both the United States and Russia wanted to see a political solution in Syria and would work with other international actors to try to achieve this. Sitting beside him, Mr Putin said that he had found many points in common on Syria during talks before the G20 summit in Mexico.

World leaders meeting in Mexico have urged European countries to take all necessary measures to overcome the debt crisis in the eurozone. The German Chancellor Angela Merkel said that a new Greek government must

honor commitments

made to international lenders. Bridget Kendall reports.

Whatever happens next in Greece, pressure in mounting on the eurozone at the summit to sort out its problems before they start to sink the world economy. A draft communication suggests G20 leaders will call on Europe to do whatever it takes to end the crisis. In the sidelines, President Obama has requested a meeting later tonight with European leaders that outlined American concerns. A numerous leaders expressed impatience and alarm at the lack of a quick and decisive solution. It's all criticism that has put EU leaders here on the defensive. The president of the European Commission, Jose Manuel Barroso, said in some

irritation

, that EU leaders haven't come to Mexico to be given a lecture.

King Abdullah of Saudi Arabia has appointed his half-brother, Prince Salman, as the new heir to the throne following the death of Crown Prince Nayef at the weekend. The announcement said that the prince would also continue his current post as defense minister. Sebastian Usher reports.