The Swiss authorities have frozen four bank accounts of Nirav Modi, the main accused in Rs-13,000-crore-PNB-fraud, and his sister as part of the ongoing criminal money laundering probe being conducted against him, PTI reported.

The accounts frozen on the request of the Enforcement Directorate (ED) to the authorities in Switzerland that the money kept in them are "proceeds of crime," reportedly have deposits totalling Rs 283.16 crore. While accounts in Modi's name have deposits of USD 3,74,11,596, accounts in the name of his sister Purvi Modi has deposits of GBP 27,38,136.

Official sources to PTI also said that the request was made sometime back along with an official request under the criminal provisions of the Prevention of Money Laundering Act (PMLA).

The ED along with the CBI are investigating Nirav Modi, his uncle Mehul Choksi and others for alleged money laundering and corruption to defraud the Brady House branch of the PNB in Mumbai to the tune of over Rs 13,000 crore.

The alleged scam was unearthed in February 2018 and Purvi Modi was also named as an accused by the ED in its chargesheet filed before a Mumbai court. Nirav Modi is presently under arrest in London in this case.