NEW : The head of the Syrian National Council warns the regime is planning a massacre . A man holds an AK-47 rifle as he stands in front of his damaged house after it was hit by what activists said were barrel bombs dropped from helicopters on February 22, 2013 near Damascus. He calls on allies to act outside of the U.N. Security Council . This is what we need , '' said Sieda . NEW : At least 160 people are killed across Syria on Saturday , says an opposition group . Kofi Annan expresses concern for an `` imminent battle '' in Syria 's largest city .
NEW : The head of the Syrian National Council warns the regime is planning a massacre . A man holds an AK-47 rifle as he stands in front of his damaged house after it was hit by what activists said were barrel bombs dropped from helicopters on February 22, 2013 near Damascus. He calls on allies to act outside of the U.N. Security Council . NEW : At least 160 people are killed across Syria on Saturday , says an opposition group . Kofi Annan expresses concern for an `` imminent battle '' in Syria 's largest city .