Sources tell CBC News Indian officials have not denied the existence of the intelligence in private

The Canadian government has amassed both human and signals intelligence in a months-long investigation of a Sikh activist’s death that has inflamed relations with India, sources tell CBC News.

That intelligence includes communications involving Indian officials themselves, including Indian diplomats present in Canada, say Canadian government sources.

The intelligence did not come solely from Canada. Some was provided by an unnamed ally in the Five Eyes intelligence alliance.