For the second time in recent months, the Indian government is facing questions about whether it was involved in an assassination plot on Western soil, as American officials said they had expressed concerns to New Delhi about a thwarted plan to kill a dual U.S.-Canadian citizen.

U.S. officials did not publicly accuse India of trying to orchestrate the killing of the dual citizen, reported by news outlets to be Gurpatwant Singh Pannun, a vocal advocate of the cause of Sikh separatism.

But the revelation of a foiled plot comes just months after Prime Minister Justin Trudeau of Canada accused the Indian government of involvement in the killing of another Sikh separatist, Hardeep Singh Nijjar, on Canadian territory. And in the case of Mr. Pannun, news outlets, led by The Financial Times, reported on Wednesday that the Biden administration had told the Indian government it had information possibly linking New Delhi to the plot against him.

Responding to those reports, which cited anonymous U.S. officials, the Indian foreign ministry issued a vaguely worded statement acknowledging discussion with the United States on the matter.

“The U.S. side shared some inputs pertaining to nexus between organized criminals, gun runners, terrorists and others. The inputs are a cause of concern for both countries, and they decided to take necessary follow-up action,” the statement said.

In its own statement on Wednesday, the White House’s National Security Council said: “We are treating this issue with utmost seriousness, and it has been raised by the U.S. government with the Indian government, including at the senior-most levels. Indian counterparts expressed surprise and concern. They stated that activity of this nature was not their policy.”