Ukrainian protesters lambasted parliament on Thursday for its lack of action, and a senior U.S. diplomat arrived in Kiev to try to help find a resolution to the country's grinding political crisis. Assistant Secretary of State Victoria Nuland met separately with President Viktor Yanukovych and with opposition leaders during her two-day stay in the Ukrainian capital, AP reported. A statement on Yanukovych's website said the president "emphasized that he would do everything to prevent escalation of the conflict." There were no immediate details about her meeting with the opposition figures. Two days before Nuland arrived in Kiev on Thursday, a video was posted on YouTube containing audio of an alleged phone call between her and U.S. Ambassador Geoffrey Pyatt. During it, a voice resembling Nuland's expresses profane impatience with the European Union over international efforts to resolve Ukraine's political crisis. U.S. officials said they suspect Russia is behind the leak of the apparently bugged phone conversation. -- SPA 23:39 LOCAL TIME 20:39 GMT تغريد