The Russian President Mr Dmitry Medvedev has said that the Group of 20 countries set to hold a summit in Pittsburgh this week must move faster to reach an agreement on reforming the global financial system.<br/><br/>Talking to reporters during his two day state visit to Switzerland the Russian leader noted there is no accord among the G20, which includes developed and developing countries, on issues surrounding the reform of institutions such as the International Monetary Fund.<br/><br/>He warned that while global economy is slowly emerging from the crisis future difficulties may lie ahead. <br/><br/>A year after global finance imploded, US President Barack Obama hosts a G20 summit starting Thursday aimed at tightening regulations to ensure such a calamity never happens again.<br/><br/>As countries claw back from recession, led by growth in Asia, the onus on leaders gathering in Pittsburgh is to decide when to pull the plug on state stimulus packages and how to coordinate that move.