Special "designer dogs" which have been cloned for sniffing explosives and drugs are being used by police and security services in Russia.

The three Belgian Malinois - each valued at £80,000 - were cloned by a South Korean professor who also aims one day to restore extinct woolly mammoths to the vast and frigid Russian province of Siberia.

They are the first cloned service dogs in Russia and they will be assigned to police and the FSB secret service in Yakutia, the coldest inhabited region in the world.

Before they enter service however the first task for the dogs - gifted to Russia by Dr Hwang Woo Suk - is language retraining as they only understand orders in Korean.