A RUSSIAN boy aged 4 has tragically died after sleepwalking out of his village house into savage -20 degrees Celsius cold in the middle of the night.

He wore only thin pajamas, and his grief-stricken mother Maria, 27, found his lifeless body after following his tiny footprints in the deep snow when she woke up at 6 a.m.

The Siberian child, called Bogdan, had set out towards a neighbor’s house.

He had gone sleepwalking before, but in summer when the temperatures in Krasnoyarsk region are warm.

Maria woke up at 6 a.m. and could not find her boy in the house. She discovered he had unlatched the door and gone out into the severe cold with nothing on his feet, and no hat.

She followed his tiny sleepwalking footprints and soon saw his frozen body.

The Russian authorities have launched an investigation into his sad death.

The boy lived in the village of Yaga in the Uzhursky district of Krasnoyarsk region, The Siberian Times reported.

(SD-Agencies)