Ukrainian opposition leader Vitaly Klitschko has urgedthe European Union to meditate in the country's deep political crisis, dpa reported."Someone should follow the course of negotiations and mark allcommitments and obligations," Klitschko said after a meeting with EUforeign policy chief Catherine Ashton late Tuesday in Kiev.Klitschko added that Ashton had assured him that the EU is ready tosend high-level mediators to negotiations between opposition leadersand the government.