The remains of a medieval ‘mummy’ wrapped in a cocoon of birch bark has been discovered at the site of a village that belonged to a mysterious arctic civilisation.

Archaeologists discovered the remains, which they believe may be a child or teenager from the 12th or 13th century, while excavating near the town of Salekhard in Tyumen Oblast, Russia.

The site, which is 18 miles south of the Arctic Circle, is thought to be a medieval necropolis where several bodies have been buried in ways unlike anything else found in the region.

The human remains, which were found wrapped in a birch bark ‘cocoon’ shown above, are thought to have been mummified by a combination of copper buried with the body and the freezing permafrost. Archaeologists have removed the body in its wrappings from the sandy soil so it can be examined at in Salekhard, Russia

Artifacts found at the site, including bronze bowls, have led experts to conclude the people had links to Persia, some 3,700 miles to the south-west.

Experts say bodies found at the site appear to have been naturally mummified in the permafrost as a result of being buried with sheets of copper in their shrouds and frozen conditions.

Archaeologists have now removed the latest body to be discovered from the sandy soil, which is now only frozen for part of the year – it is the first human remains to be found since 2002.

The remains, which are being kept in a special freezer in the Shemanovsky Museum in Salekhard, are due to be examined next week.

The birth bark cocoon is around 1.3 metres (4 feet) long and 30cm (12 inches) wide and initial examination has revealed there is metal beneath the birch bark.

Experts say it is likely the body inside has been mummified much like others found at the site.

Alexander Gusev, a fellow of the Research Centre for the Study of the Arctic in Russia who led the excavation, told the Siberian Times the birch bark cocoon appeared to have been wrapped around the body.

He said: ‘It follows the contours of the human body. If there is really a mummy, the head and skull are likely to be in good condition. We think it is a child, maybe a teenager.

‘The find is now in Salekhard, in the Shemanovsky Museum, in special freezer. We plan to return to Salekhard on 15 July and immediately start the opening of the ‘cocoon’.’

The mummy was discovered at the site of a medieval necropolis called Zeleny Yar, which has baffled some archaeologists due to its closeness to the Arctic Circle.