Canada’s expulsion last week of six Indian diplomats marks the second time in just over a year that the government has sent foreign representatives from that country packing.

In September of last year, Canada expelled a top Indian diplomat, and a senior Canadian diplomat was expelled from India in return, after Prime Minister Justin Trudeau told the House of Commons there was credible intelligence about a potential link between India’s government and the killing of B.C. Sikh leader Hardeep Singh Nijjar.