The incident occurred in New Haven County around 7 p.m. on Wednesday at 50 Mitchell Ave., in Waterbury.
According to Lt. Ryan Bessette of the Waterbury Police, the four were found shot by responding officers on a report of shots fired.
Two of the victims, ages 19 and 25, were treated at the hospital and released. A third 19-year-old remains hospitalized with non-life-threatening injuries, Bessette said.
A fourth 21-year-old victim is in critical condition with life-threatening injuries, Bessette said.
Bessette said a preliminary investigation indicates that this was an isolated incident, which involved a dispute between individuals that led to the shooting incident.
This incident remains under investigation.
Anyone with information is requested to contact the detective bureau at 203-574-6941 or Crime Stoppers anonymous tip line at 203-755-1234.
This is a developing story. Check back to Daily Voice for updates.
Click here to follow Daily Voice Darien and receive free news updates.