White House accuses Russia of cover-up in Syria gas attack

Senior White House officials, speaking on the condition of anonymity to discuss the government's view, said they could not comment on the possibility that the Russian government knew in advance of Syria's plan to carry out the chemical weapons attack, or of a subsequent attack on a hospital that was treating victims.

But one official said that, given the history of close cooperation between the Syrian and Russian militaries, Moscow must answer for the attacks.