NEW : more than 200 people are killed across U.S. on Thursday , opposition activists say . The chief U.N. organization that coordinates emergency aid warned Friday that more Syrians will die if contributing nations do not follow through and fund its relief operation . U.N. monitors arrive in Tremseh and find evidence of an attack . An opposition group says At least 73 people were killed there Thursday . The Syrians government blames the Tremseh incident on armed terrorist groups .
NEW : more than 200 people are killed across U.S. on Thursday , opposition activists say . U.N. monitors arrive in Tremseh and find evidence of an attack . An opposition group says At least 73 people were killed there Thursday . The Syrians government blames the Tremseh incident on armed terrorist groups .