An alleged plot to kill a U.S. citizen and Sikh activist on American soil last year was approved by senior-level members of India’s intelligence agency, including its chief at the time, the Washington Post reported, citing people familiar with the matter it didn’t identify.

The alleged plan to kill Gurpatwant Singh Pannun was cleared by the former head of the Research and Analysis Wing, India’s spy agency, while other high-ranking RAW officials have also been implicated, the newspaper reported Monday.

U.S. intelligence agencies also tentatively found that Prime Minister Narendra Modi’s national security adviser was probably aware of RAW’s plan, although officials told the newspaper there was no smoking gun evidence that’s emerged.