Syria says three `` terrorists '' confessed . U.N. personnel stranded overnight in Khan Sheikhoun were released after a few hours, but the Syrian government has not yet acknowledged their release. At least 15 people were killed Wednesday , opposition activists say . Opposition groups say President Bashar al-Assad 's government has been trying to mar their efforts with false accusations of links to terrorism . 250 arrested people were released , Syria says .
Syria says three `` terrorists '' confessed . U.N. personnel stranded overnight in Khan Sheikhoun were released after a few hours, but the Syrian government has not yet acknowledged their release. At least 15 people were killed Wednesday , opposition activists say . 250 arrested people were released , Syria says .