KOLKATA: Indian police have arrested foursuspected corpse smugglers and recovered 18 intact skeletons and other bones believed exhumed from cemeteries in a notorious grave-robbing district, anofficial said Tuesday.

Police seized the "neatly washed and cleaned" human remains from avillage in West Bengal state's Burdwan district on Sunday that led to the arrest of four men allegedly part of an international smuggling ring."The skeletons, neatly washed and cleaned were about to be smuggledand sold. We suspect that they are part of an international skeleton smuggling racket," Anuj Sharma, West Bengal's deputy police chief, told AFP.

Sharma said the recovery was part of a larger consignment that wasbeing smuggled out of the area.        Investigators have identified the recipients of the cache that theysuspect was stolen from graveyards in the Muslim dominated district.

In 2006, violence broke out in the village over the security ofgraveyards after police seized more than 20 human skulls, with locals demanding armed guards protect the burial sites. A year later 50 skulls were recovered from the same district.

India banned the trade of human bones in 1985 after coming underpressure from human rights groups that argued the practice violated the basic principles of humanity, but it simultaneously forced the trade underground. Before the ban, many poor families were selling the corpses tosmugglers to save on cremation or burials costs in the poverty-stricken region.

Local gangs steal corpses from burning pyres and graves, with manyrelying on morgues that sell them unclaimed bodies for few thousands rupees.   The eastern state is notorious for the illegal trade and has become ahub of the thriving industry, with thousands of human skeletons smuggled out of India every year to Nepal, China and Bangladesh.

The skeletons are often sent to the US, Japan, Europe and the MiddleEast where they are used as specimens in medical colleges. Some of them are sent to China to be used in the production of aphrodisiac drugs or within India for black magic and other Hindu rituals.

Over the years, police have recovered thousands of skeletons fromWest Bengal, Bihar and Jharkhand states. Police in Bihar recovered about 1000 skulls from the banks of riverFalgu in the ancient Buddhist town of Bodhgaya in 2004.

In 2009, police arrested a smuggler with 67 human skulls and bonesfrom a passenger bus in Bihar's Chappra district, less than a month before West Bengal recovered 27 children's' skulls and 100 bones from a passenger in Silliguri district.-AFP