Chemical weapons expert: Douma attack looks like chlorine

At least 70 people have died in a suspected chemical attack in Douma, the last rebel-held town in Syria's Eastern Ghouta, rescuers and medics say.

Syria has called the allegations of a chemical attack a "fabrication" - as has its main ally, Russia.

The British chemical weapons expert Richard Guthrie has been watching the reports coming out of the area and talked them through with Newshour's James Menendez.

(Photo shows: Smoke billows in the town of Douma, the last opposition holdout in Syria's Eastern Ghouta, on April 7, 2018. Photo credit: STRINGER/AFP/Getty Images)