chicago press conference
WLS
chicago press conference
Now playing
00:53
12 dead in Chicago Christmas shootings
CNN
Now playing
03:37
They bury Chicago's gun victims. Even family
Now playing
02:15
Dozens shot in weekend of violence in Chicago
WBBM
Now playing
01:45
Protests erupt after shooting in Chicago
chicago violence monday june 26
HLN
chicago violence monday june 26
Now playing
01:45
At least 21 people shot in one day in Chicago
A teenage boy died early Tuesday, more than 20 hours after he was shot in the head at a party on the Near West Side and his body covered with a sheet as paramedics treated others who were hit by gunfire.
Evanston Township High School
A teenage boy died early Tuesday, more than 20 hours after he was shot in the head at a party on the Near West Side and his body covered with a sheet as paramedics treated others who were hit by gunfire.
Now playing
00:36
Chicago shooting victim mistaken for dead
chicago PD
HLN
chicago PD
Now playing
01:40
Chicago has deadliest weekend of the year
donald trump chicago tweet es_00000526.jpg
donald trump chicago tweet es_00000526.jpg
Now playing
00:53
Trump threatens to send 'the Feds' to Chicago
WGN
Now playing
00:47
Man makes crosses for gun violence victims
chicago gun crime sanchez young segment_00000123.jpg
Getty Images
chicago gun crime sanchez young segment_00000123.jpg
Now playing
02:40
Chicago crime has fallen for 15 straight months
lynch chicago presser
CNN
lynch chicago presser
Now playing
01:02
DOJ: Chicago police use excessive force
Chicago Police Department
Now playing
00:49
Police commander killed assisting on call
dimitri roberts
CNN
dimitri roberts
Now playing
00:55
Former Chicago police officer blasts Trump
Now playing
01:19
They help kids get to school safely in a violent city
Kajuan Raye, 19, shown in this undated photograph, was shot and killed by a Chicago police district sergeant on the night of November 23, 2016, police say.
Family of Kajuan Raye
Kajuan Raye, 19, shown in this undated photograph, was shot and killed by a Chicago police district sergeant on the night of November 23, 2016, police say.
Now playing
00:52
Cop fatally shoots teen, says he was armed
chicago basketball player cousin nykea aldridge crane pkg_00013415.jpg
Getty Images
chicago basketball player cousin nykea aldridge crane pkg_00013415.jpg
Now playing
01:57
Nykea Aldridge's death comes amid Chicago murder spike

Story highlights

City police investigating 27 shooting incidents over the weekend

Police say majority of cases "were targeted attacks"

CNN —  

Chicago’s citywide crime wave didn’t slow down during the holiday weekend.

City police investigated 27 shooting incidents this Christmas weekend, 12 of which were fatal, city Police Superintendent Eddie Johnson said during a Monday news briefing.

“The violence primarily occurred in areas with historical gang conflicts on the South and West sides of the City,” Johnson said. “We now know that the majority of these shootings and homicides were targeted attacks by gangs against potential rival gang members and groups who were at holiday gatherings.”

Chicago police said there have been 753 homicides and 3,495 shooting incidents in the city from January 1 to December 25. During the same time frame in 2015, there were 478 homicides and 2,393 shooting incidents.

“These were deliberate and planned shootings by one gang against another,” Johnson said Monday. “They were targeted knowing fully well that individuals would be at the homes of family and friends celebrating the holidays. This was followed by several acts of retaliation.”

In one Christmas night incident, a man walked out of an alley, opened fire on people partying on a porch in the East Chatham neighborhood and then ran away, CNN affiliate WLS reported. Two brothers 18 and 21 years old died and five people were wounded. No arrest has been reported.

Ninety percent of those killed had gang affiliation, criminal history and had been identified as potential offenders or victims of gun violence, said Johnson. Forty-five guns were seized over the weekend, he said.

Johnson called on Chicago’s policymakers to enact stricter gun laws, specifically to increase sentences for repeat gun violence offenders.

Johnson said criminals feel empowered and emboldened by recent criticisms of police.

“When they feel the public will speak out for them and not the police officers, that’s giving them the power to go out and do what they did,” Johnson said.

August was the deadliest month, with 96 homicide reports, the Chicago Tribune said. In one weekend in August, there were eight gun-related homicides and 64 non-fatal shootings.