Mummified man found in chimney.

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The mummified body of a man thought to have died 20 years ago was found in the chimney of a Finnish industrial building while it was being demolished.

Identification papers found in a wallet in the corpse's pocket indicated it belonged to a man born in 1953 who disappeared in 1991. He was declared dead in the early 2000s, local tabloid Ilta-Sanomat reported.

"The police are investigating whether the man was placed in the chimney or went there himself," criminal investigator Juha Juurinen told Finnish news agency STT.

The chimney, in a factory in the city of Vantaa near Finland's capital, was not used for decades, and the body was found Sunday as construction workers tore it down.