United Nations war crimes investigators say Syrian government forces have used chemical weapons more than 25 times during the ongoing war, including during the deadly attack in Khan Sheikhoun in April, which killed 86 people. The Syrian government has long denied using chemical weapons. Meanwhile, in more news from Syria, the Syrian government says its forces have broken the ISIS siege on parts of the eastern city of Deir ez-Zor. Tens of thousands of civilians have been trapped by the ISIS siege of the city for more than two years.