A U.N. envoy held back-to-back meetings Sunday with opposition leader Aung San Suu Kyi and Myanmar's military rulers, trying to find a peaceful solution to the crisis that has engulfed the impoverished country. The separate talks occurred as thousands of troops locked down Myanmar's largest cities Sunday. Scores of people were arrested overnight, further weakening an uprising to end 45 years of military dictatorship, the Associated Press reported. Ibrahim Gambari, the U.N.'s special envoy to Myanmar, went to the remote bunker-like capital Naypyitaw on Saturday to meet with the junta and stayed overnight, diplomats said. On Sunday, he returned to Yangon and was whisked to the State Guest House to meet Suu Kyi, who was brought out of house arrest to see the U.N. envoy. The meeting lasted about 90 minutes, said the diplomats, who spoke on condition of anonymity, citing protocol. Details of the meeting were not immediately known.