Bones found in northwest surburban Norridge and on the Near North Side on Wednesday were not human, the Cook County medical examiner's office determined following examinations today.

Contractors in Norridge discovered the remains while digging in an alley in the 4000 block of Ozanam Avenue -- near the Acadia Park and Irving Park cemeteries -- about 5 p.m. Wednesday, Norridge police said in a news release.

Police secured the bones and sent them to the Cook County medical examiner's office.

Wednesday morning, contractors working on a renovation of a building found a skeleton in a basement in River North.

In both cases, the remains were not human, the medical examiner's office determined following an examination today.

Staff reporters Liam Ford and William Lee contributed

chicagobreaking@tribune.com