Edit: Oh they probably don't want oil prices to go up so close to an election
There's no source. Afaik it came from an Indian "news" site first and then every other site parroted it around, causing all the anti-US guys to circlejerk about it, reaffirming their confirmation bias. And now we have Ukraine saying it didn't happen and IIRC one US guy earlier also said they can and should go right ahead with it.