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A stabbing spree in Illinois left four people dead and five injured, including one person in critical condition, officials said Wednesday. 

The attacks happened at multiple locations in Rockford, Illinois, west of Chicago. 

A suspect, who police said "attacked and stabbed" the victims, has been taken into custody. 

Police said he is a 22-year-old man, but he remains identified. 

TEXAS BOY, 12, CHARGED IN STABBING THAT LEFT WOMAN IN CRITICAL CONDITION 

Aerial view of crime scene

Rockford, Illinois, police said four people have been killed by a suspect involved in a stabbing spree.  (FOX 32)

Three people were pronounced dead at the scene and one victim died later at a hospital. 

Another aerial view of the scene

Rockford police don't yet have a motive for the attacks. (FOX 32)

The victims include a 15-year-old girl, a 63-year-old woman, a 49-year-old man and a 22-year-old man, police said in an update. 

One of the victims was a 25-year veteran of the U.S. Postal Service, police said. 

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Rockford Mayor Tom McNamera said he was "totally shaken" by the "senseless" violence of the attack. 

Police said they don’t yet have a motive for the attacks, adding that not all of the victims were stabbed, without elaborating. 

The attacks happened on Holmes Street, Winnetka Drive and Cleveland Avenue.