Updated at 8:20 a.m. ET: Syria accepted a ceasefire and peace plan drawn up by Kofi Annan, the U.N. and Arab League special envoy said on Tuesday, even as Syrian troops thrust into Lebanon to battle rebels who had taken refuge there.

On a two-day visit to Beijing, Annan told Chinese Premier Wen Jiabao that he faced a long and difficult task in his mission to end fighting in Syria, but global cooperation with China and other countries was the only way to do it.

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