A 16-year-old youth, already in custody and charged in another shooting, is now charged in connection with this summer’s Danzig St. mass shooting.

The suspect, who cannot be identified because he is a minor, faces charges that include threatening death, use of a firearm to commit an indictable offence and possession of an unauthorized weapon.

The teen is the fourth person charged in the worst mass shooting in Toronto’s history, which saw two innocent bystanders, Shyanne Charles, 14 and Joshua Yasay, 23, killed and 23 others wounded.

He is not, however, facing murder charges like the other three.

Staff Insp. Greg McLane of the homicide squad confirmed Tuesday the teen is the same 16-year-old charged with attempted murder for a September shooting on Chester Le Blvd., near Finch Ave. E. and Victoria Park.

During that Sept. 2 incident, a 17-year-old, who was wounded during the Danzig St. shootout, was shot in the leg while riding his bike. Late last month, that boy, who also can’t be named under the Youth Criminal Justice Act, was charged with two counts of second-degree murder, attempted murder and 22 counts of aggravated assault in connection to the Danzig St. shooting.

Also charged last month are alleged Malvern Crew gang member Shaquan Mesquito, 18, who is facing two counts of first-degree murder and 23 counts of aggravated assault and alleged Galloway Boy gang member Nahom Tsegezab, 19, charged with two counts of second-degree murder and 22 counts of aggravated assault.

Police believe Mesquito was turned away from the July 16 barbecue and returned with associates to seek revenge against members of the Galloway Boys.

The Star has previously reported that the 16-year-old alleged shooter in the Chester Le shooting has connections to Tsegezab.

Asked if there would be any more charges laid in the Danzig St. shooting, McLane said Tuesday the investigation was “far from being over.”