The OPCW inspectors are held up by the United Nations Department of Safety and Security (UNDSS) which has a say about any movement of UN aligned organizations in areas that might be dangerous. The UNDSS is led by an Australian police / intelligence officer. The holdup seems to be intended.
On Sunday April 8 videos were published of an alleged 'chemical attack' in Douma near Damascus. At that time the area was under control of Jaish al-Islam, a Salafi terrorist organization financed by Saudi Arabia. The various videos from terrorist supporters like the 'White Helmets' were unconvincing. They showed obviously arranged scenes of an alleged 'barrel bomb' and manipulated bodies of dead children that had been moved and decorated with shaving foam to superficially fit the claims of a 'chemical incident'. Another video showed people in a hospital being doused with water for no apparent reason.