OTTAWA, Jan 26 (Reuters) - India is cooperating with Canada amid tensions over the case of a Sikh separatist leader who was murdered in British Columbia last June, a senior government official told CTV in an interview published on Friday.

"India is working with us ... far more closely to resolve this," said Jody Thomas, national security advisor to Prime Minister Justin Trudeau.

Diplomatic relations soured after Trudeau last year said Canada was "actively pursuing credible allegations" that Indian government agents were potentially linked to the murder of Hardeep Singh Nijjar. India has denied any formal government role in Nijjar's murder. (Reporting by David Ljunggren, editing by Ismail Shakil)