Police in the Canadian province of Nova Scotia have made two arrests as tensions rise over a lobster fishery set up by the indigenous community. Officers detained two people for assault as crowds gathered to mark the launch. Members of the Sipekne’katik First Nation say they have a right to issue fishing licences to their own people. Non-indigenous lobster fishers, however, say their boats are operating out of season and should be stopped. The row comes on the anniversary of a ruling that affirmed the rights of indigenous groups to hunt and fish.