A fraud of around $2.2 billion took place in PNB, the second largest in public sector, by diamond trader Nirav Modi and his uncle Mehul Choksi. ED has sent letters rogatory (LRs) -or, formal request from a court to foreign courts seeking judicial assistance – to Singapore, South Africa, the United Kingdom, Dubai, Belgium, the United States, Russia, France, China, and Hong Kong among others where Modi and Choksi are believed to have business interests in.