Chennai, May 6 -- Tamil Nadu Police have arrested four people for allegedly stealing diamonds worth Rs 20 crore after assaulting a merchant inside a hotel in Chennai.

The accused were arrested near the Thoothukudi toll plaza on Monday night during a vehicle search, said the police.

The arrested have been identified as John Lawer, Vijay, Ratheesh and Arun Pandiarajan. The police said that the robbery took place at a hotel in Chennai. The accused tied up the victim in his hotel room as they robbed the diamonds and fled.

The merchant screamed for help and was saved by the hotel staff. Then he filed a complaint at the Vadapalani police station, which registered a case and began the investigation, according to the police.

Upon receiving th...