U.N. Secretary-General Ban Ki-moon and the director general of the independent Organization for the Prohibition of Chemical Weapons (OPCW) said they were deeply concerned about the alleged used of chemical weapons in Syria.
Ban's office said in a statement:
The Secretary-General remains convinced that the use of chemical weapons by any party under any circumstances would constitute an outrageous crime.
The OPCW is a Hague-based body charged with overseeing the implementation of the Chemical Weapons Convention.
More top news
Gambia's outgoing president Yahya Jammeh will contest his election loss at before the country's Supreme Court, the ruling party has said.
Defence Secretary Michael Fallon has said Boris Johnson's comments about Saudi Arabia "playing proxy wars" were taken out of context.
Home Office files on the Battle of Orgreave are due to be released next year among a host of records relating to the 1984 miners' strike.