Cryptocurrencies such as bitcoin promise quick profits – an attraction that aids scammers fleecing investors of their funds.

Canadian police have arrested three men thought to have been involved in the killing of Hardeep Singh Nijjar, a Sikh activist whose death last year triggered a huge diplomatic row between Ottawa and New Delhi.

Afghanistan's diplomat Zakia Wardak said she was stepping down as the consul-general in Mumbai because of organized attacks against her. Her statement made no mention of the alleged gold smuggling accusations.