CHICAGO (CBS) — An unidentified man was found dead outside a CTA bus barn on the South Side.

Chicago Police are investigating after the body was found around 11:30 p.m. on Wednesday in a lot.

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The bus barn is located in the 7800 block of South Vincennes Avenue.

Police believe the man accidentally cut himself and bled to death.

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The victim was not a CTA employee.

The man’s cause of death was not immediately known.

Area South detectives are investigating.

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The lot is not accessible to the public, CTA spokesman Brian Steele said.