The US counter-intelligence chief said he was worried about threats from China and Russia to disrupt the coronavirus vaccine supply chain in the United States.

William Evanina, director of the US National Counterintelligence and Security Center, told an online Washington Post event that US adversaries were trying to interfere with Operation Warp Speed, the US government operation distributing the vaccines.

“Our adversaries are trying to disrupt that supply chain,” he said. Asked which adversaries he was particularly concerned about, he replied, “I would say China and Russia right now.”