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 an adult man, but he has not been identified. 

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

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

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

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

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