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Associated Press
In this image made from amateur video released by the Shaam News Network and accessed Sunday, April 15, 2012, smoke rises from buildings across the city following purported shelling in Homs, Syria. Syrian troops are reported to have shelled residential neighborhoods dominated by rebels in the central city of Homs Sunday, activists said, killing at least three people hours before the first batch of United Nations observers were to arrive in Damascus to shore up a shaky truce. (AP Photo/Shaam News Network via AP video) TV OUT, THE ASSOCIATED PRESS CANNOT INDEPENDENTLY VERIFY THE CONTENT, DATE, LOCATION OR AUTHENTICITY OF THIS MATERIAL

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