Assad used nerve gas at least 4 times

Human rights watch has issued a new report stating that in addition to the April 4th chemical attack on Idlib in Syria, the Assad regime used nerve gas in three other recent incidents.

According to the group's report, delivered at un headquarters in new york and based on interviews with dozens of witnesses, as well as analysis of photos and video, new evidence shows a "pattern of chemical weapons use".

The report also indicates that regime use of helicopter-dropped-chlorine-filled munutions has become more systematic. It also says that regime or pro-regime ground forces have started using improvised ground-launched munitions filled with chlorine.

More than 100 civilians were killed and 500 others injured, mostly children, in a sarin gas attack on April 4th, carried out by Assad regime warplanes in the town of Khan Shaykun.