Ros Atkins on… the India-Canada murder row

The escalating row over the murder of a Sikh separatist leader has the potential to derail years of close relations between Canada and India - two key strategic partners on security and trade.

The BBC's analysis editor Ros Atkins examines how things reached this point and why the case is putting the relationship between Justin Trudeau and Narendra Modi on ice.

Produced by Michael Cox and Catherine Karelli