Transcript for UN Details War Crimes in Syria
-- Phillips and she. Used to be fighting side by side now fighting each other. Syrian rebels who were waging war against the forces of the Charlotte sodomy now -- against diocese right now -- -- Syria hello everyone I'm Michelle for. Three years into the war the conflict and alliances and Syria. Now so complex especially because of the spread of the -- extremist group known as -- That now calls itself the Islamic state and a new united in the U nations report out today tells in -- -- the brutal acts. Perpetrated by all sides of the war. Leading to more than the 190000. Deaths including mass bee headings by -- And barrel bombs filled with chemical weapons used by the Asad regime. The BBC's Richard Galvin has more on the atrocities in Syria. -- three years of intense fighting has laid waste to many of Syria's main cities and towns. It's estimated more than a 190000. People have died. But still -- conflict. Now United Nations investigate to say. With all sides committing war crimes what's happening in Syria should be referred. To the international criminal courts. In their latest reports on the conflict the UN investigates has highlights the deteriorating situation. They say government forces have dropped barrel bombs containing chemical agents on at least eight occasions this year. -- have been systematic torture and deaths in Syrian jails. On the other side the extremist group Islamic state is forcing employees to join training camps. And public executions by Islamic states. Are commonplace in the area and there -- control. According to the UN investigates -- that is responsible for all these atrocities. Must ultimately be. Held to account. What -- very much based upon the pursuit of justice. One important element is to document the violations with them corroborated -- well checked evidence and we have. To date set computerize more than 3000. Witness victim interviews. It's that particular brutality -- the Islamic state militants which is singled out in this report. And the group is growing in strength having already seize control of parts of both Syria and Iraq. -- -- -- BBC news. And you can keep up with this story in real time by downloading the ABC news happened starring. This story for those exclusive updates on the go you've been watching international hot spot I'm Michelle Franzen in New York.
This transcript has been automatically generated and may not be 100% accurate.