Mumbai, Aug 26 (IANS): Four thieves who carried out the diamond heist of over Rs.6.6 crore from a jewellery show here and fled to Dubai were brought to Mumbai early Thursday, a senior official said.

"We have brought them here. We will present them in the magistrat's court in the afternoon," Additional Commissioner of Police (Crime) Deven Bharti told IANS.

Three Mexicans, one of them a woman, and a Venezuelan stole the diamonds from the India International Jewellery Show-2010 (IIJS-2010) Monday and fled to Dubai. They were detained by the Dubai police Tuesday after a request from the Indian home ministry.

The suspects put the diamonds in small plastic bags before swallowing them. The Dubai police made them purge out the valuables after taking them into custody.

The case was cracked and the suspects identified after studying the CCTV footage and checking records of over 1,500 visitors to the IIJS-2010. The records at the immigration offices at Mumbai's Chhatrapati Shivaji International Airport were also checked.

Police swung into action after Guy Ezekeil Vaz, the Asia sales manager with Dalumin Hongkong, a diamond company based in Hong Kong, lodged a complaint late Monday over the theft of a box containing diamonds.

The four suspects -- Guerrero Lugo Elvia Grissel, 24, Gonzalez Maldonado Mauricio, 24, Campos Molan Elias, 39 -- all Mexican nationals, and Gutierez Orlando of Venezuela -- are now in the custody of Mumbai police.