Intelligence gained by the “Five Eyes” network led to Canada’s public accusation that the Indian government may have played a role in the assassination of a Sikh separatist activist on Canadian soil, the US Ambassador to Canada said Sunday.

I’m “confirming that there was shared intelligence among Five Eyes partners that helped lead Canada to making the statements that the prime minister made,” US Ambassador to Canada, David Cohen, told CTV’s Question Period with Vassy Kapelos in a Sunday interview.

Five Eyes is an intelligence sharing pact between the United States, the United Kingdom, Canada, Australia and New Zealand, though the ambassador would not confirm if that shared intelligence came from the US. “I’m not. I wouldn’t in any circumstance,” Cohen said.

Relations between India and Canada plummeted last week after Canadian Prime Minister Justin Trudeau said authorities had been investigating “credible allegations” that New Delhi was potentially behind the June killing of Hardeep Singh Nijjar, a Sikh separatist activist, who was gunned down by two masked men in Surrey, British Columbia.