Horrific discovery in Niagara Falls, NY

Police in Niagara Falls, New York have been searching for a suspect after a woman was found chained in a basement.
    
Police received a call about an assault  around 1:00 yesterday morning.

They found a broken window and blood but no one was at the home.
    
The woman's family was unable to make contact with her and police returned with a bloodhound.

The dog tracked her to another home nearby where she was rescued.
    
Further details of the investigation have not been made public.