Doctors get to the bottom of $400,000 diamond theft

A POLICE investigation in Thailand has literally gotten to the bottom of the theft of a 10 million baht ($A392,000) diamond last week.

Police Colonel Mana Tienmaungpak said on Sunday that a doctor wielding a colonosope and the medical equivalent of pliers pulled the 6-carat gemstone from the large intestine of the Chinese woman alleged to have stolen it, after nature and laxatives failed to get it out.

The woman and a male partner were arrested on Thursday night at Bangkok's Suvarnabhumi Airport on their way out of Thailand on the basis of surveillance video at the jewellery fair where the duo