S Korea trains sniffer-dog clones

The cloned sniffer puppies have already shown their potential

The world's first cloned sniffer dogs have begun training in South Korea.

Seven puppies have been created using cells taken from a labrador considered by customs officials to be their best sniffer dog.

The puppies were born last year after the country's customs service paid a biotechnology company to reproduce a Canadian Labrador Retriever.

Their handlers say they are already showing the same high level of skill as the original dog.

Only about 30% of naturally-born sniffer dogs make the grade, but South Korean scientists believe that could rise to 90% using the cloning method.

The puppies were born to three surrogate mothers after scientists used the nuclei of somatic cells from a sniffer dog called Chase. The state-funded project cost about 300m won ($300,000; £150,000).

A spokesman for South Korean customs said the pups have passed the first round of tests for behavioural patterns and genetic qualities and will report for duty in June after completing a second round of training.

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