Biden raised the issue of the Canadian Sikh’s murder with Modi at the G20.

According to a story in the Financial Times on Thursday, U.S. Vice President Joe Biden and other world leaders voiced their worry to Indian Prime Minister Narendra Modi during this month’s G20 conference about allegations that New Delhi was complicit in the assassination of a Sikh separatist leader in Canada.

The newspaper reported, citing three people with knowledge of the summit, that several members of the Five Eyes—the United States, the United Kingdom, Canada, Australia, and New Zealand—brought up the June killing in British Columbia of Hardeep Singh Nijjar, a Sikh separatist leader, with Modi.

A call for comment from the White House on the FT article initially went unanswered.

The event occurred in India several days before Canadian Prime Minister Justin Trudeau made his accusations public earlier this week in a speech to parliament.

Canada reportedly persuaded its allies to bring up the issue with Modi during the G20 summit, and the leaders intervened.

U.S. national security adviser Jake Sullivan said on Thursday that Washington is not granting India a “special exemption” in the case despite Ottawa’s accusations about the murder of the Sikh separatist leader in Canada and that the U.S. is in contact with Indians at high levels.

India has deemed Canada’s accusations to be “absurd” and has rejected them. The current crisis has further strained relations between Canada and India. On Thursday, India ordered Canada to downsize its diplomatic presence and halted issuing new visas to Canadian citizens.

As a longtime partner and ally, Canada has put several Western countries in an awkward position as they strive to strengthen ties with New Delhi to offset China’s dominance in the Asia Pacific area.