Russia on Tuesday ridiculed the findings of United Nations chemical arms investigators who faulted Syria’s military for a lethal sarin attack on the Syrian village of Khan Sheikhoun last April, calling their report full of inconsistencies, omissions and possible fabrications.

“Systemic deficiencies have been found,” Russia’s deputy ambassador to the United Nations, Vladimir Safronkov, told the United Nations Security Council.

He called the report, submitted to the Council by an investigative panel on Oct. 26, “deeply disappointing” and emphasized that the investigators had never visited the site of the sarin attack.

Instead, he said, investigators concluded “everything could be determined without leaving your desk.”