(STMW) — Authorities are investigating whether remains found in an abandoned shed Saturday afternoon in north suburban Round Lake are human.

About 2:45 p.m., a property caretaker found what appeared to be a human skull while removing items from an abandoned shed in the 33100 block of North Fairfield Road in unincorporated Round Lake, according to a statement from the Lake County sheriff’s office.

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The Lake County coroner’s office responded and collected the possible remains, all of which appear to be “extremely aged,” according to the statement.

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The remains will be examined by a forensic pathologist, forensic odontologist and anthropologist to determine if they are human.

The sheriff’s office is investigating how the items came to be in the abandoned shed.

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(Source: Sun-Times Media Wire © Chicago Sun-Times 2016. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)