Russian President Vladimir Putin on Saturday met with the leaders of Belarus, Ukraine and Kazakhstan to discuss their nascent trade bloc that is under pressure from members' competing interests, AP reported. Presidents Viktor Yushchenko of Ukraine, Nursultan Nazarbayev of Kazakhstan and Alexander Lukashenko of Belarus joined Putin for the discussions one day after a summit of leaders from the Commonwealth of Independent States, a loose alliance made up of ex-Soviet states. In opening remarks, Putin said the leaders would discuss «some problems connected with the implementation of plans for building the Common Economic Space,» which aims at creating a free-trade zone among the four countries. Both the CIS and the Common Economic Space are under strain as some former Soviet republics look to move out of Russia's economic and political shadow and join NATO and the European Union. --mor 1423 Local Time 1123 GMT