Media playback is unsupported on your device Media caption The BBC's Ian Pannell and Darren Conway report on life - and death- on the streets of Chicago 
 
 At least 101 people were shot in Chicago over the Fourth of July weekend, 15 of them fatally, according to a city newspaper. 
 
 Nearly half of the shootings during the four-day holiday happened over 12 hours, reports the Chicago Tribune. 
 
 The youngest victim was a 13-year-old boy and the oldest a 60-year-old man. 
 
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 About half of the shootings happened between 15:30 on Tuesday and 03:30 on Wednesday, mainly in Chicago's south and west sides. 
 
 Media playback is unsupported on your device Media caption In September last year, the toll for homicides in Chicago passed 500 
 
 Not even the deployment of more than 1,000 extra officers by Chicago police department could staunch the violence. 
 
 The casualties are significantly higher than 2016, when 66 people were shot in Chicago over the Independence Day weekend, which lasted three days. 
 
 It brings the total number of people shot in Chicago so far in 2017 to more than 1,800, reports the Tribune. 
 
 But that figure is not as severe as last year when 2,035 people had been shot by this point. 
 
 At the weekend, Chicago police said shootings this year had declined 14% compared with the first six months of last year. ||||| The Chicago Police Department says it is conducting "a very comprehensive review" after the city experienced one of its most violent Fourth of July weekends in recent years, with at least 102 people shot between late Friday afternoon and early Wednesday. 
 
 "We're doing a debriefing," said chief police spokesman Anthony Guglielmi. "The mood here is frustration." 
 
 The review will include an analysis of how "amateur fireworks" might have affected the ShotSpotter system, which captures audio of gunfire and attempts to pinpoint its location for quicker deployment of officers. The system is deployed in the Englewood and Harrison districts, traditionally among the city's most violent. 
 
 "It's perplexing," Guglielmi said. "We deployed some very successful tactics over the Memorial Day weekend." Yet those same tactics did not seem to work as well over the Fourth holiday. 
 
 Fifteen people were killed and 87 others were wounded. Nearly half the shootings occurred in the last 12 hours of the long holiday. 
 
 The last time the Fourth holiday spanned four full days was in 2013, when July 4 fell on a Thursday and many people had Friday off. At least 74 people were shot between Wednesday evening and early Monday that year, and 12 of them died, according to Tribune data. 
 
 The violence this year was largely confined to the South and West sides, where hundreds of officers on overtime were deployed. The youngest person shot was a 13-year-old boy seriously wounded in Gage Park on Friday night. The oldest was a 60-year-old man in the Lawndale neighborhood. 
 
 Photos from Chicago's violent Fourth of July weekend, June 30 through July 5, 2017. 
 
 The weekend had been relatively calm when police Superintendent Eddie Johnson held a news conference early Tuesday afternoon and announced the arrests of 58 people on drug and gun charges "to keep residents and visitors safe in every neighborhood." 
 
 But within hours, violence erupted in nearly every police district south of North Avenue, according to data kept by the Tribune. At least 43 people were shot between 3:30 p.m. Tuesday and 3:30 a.m. Wednesday. Only two of those 43 were shot north of Chicago Avenue. 
 
 As part of its review of what happened over the weekend, the department is looking at how fireworks may have interfered with the ShotSpotter system, a relatively new technology the department hopes to expand. 
 
 The spotters register a shooting and deploy cameras in the direction of the shots while officers are deployed. Analysts at the district station look at the data in real time to decide what steps to take next. Guglielmi called it "micro-deployment." 
 
 The department is also reviewing calls for service, particularly as the weekend ended. "A lot of incidents happened in a short amount of time. We're also looking at that. We did typically see it (violence) where we typically see it." 
 
 A lot of the shootings appeared to be over "petty disputes that escalated into somebody pulling out a gun." He mentioned some examples: A shooting in Smith Park that started as an argument over where people were sitting; a confrontation between a driver and bicyclists on State Street, with the driver getting a gun from his trunk and officers intervening. 
 
 He said a "handful" of shootings were "retaliatory .. People drinking all day and then things escalating ... It's just enormously frustrating." 
 
 A total of 1,300 extra officers were deployed over the long weekend through 6 a.m. Wednesday. The additional officers came from the summer mobile teams, organized crime units and area saturation teams. "I don't think lack of resources was an issue." 
 
 A total of 159 guns were seized by Chicago police since Friday. "We have to change the underlying culture," Guglielmi said. 
 
 The weekend began with 19 people shot on Friday night and 23 on Saturday. Sunday and Monday nights were both relatively quiet, by summer standards, with 17 people shot over the two days, according to Tribune data. 
 
 The Harrison District on the West Side, which had gone without any shootings over the Memorial Day weekend, recorded 14 people shot over the long Fourth weekend. 
 
 At one homicide scene in the district, onlookers peeked around the entrance to the Green Line station at Pulaski Road and Lake Street, trying to get a glimpse of the body of a man chased down and shot early Wednesday. 
 
 The shooting happened on two sides of a popular West Side liquor store. Officers found shell casings and one man shot behind the store, next to an alley. The other wounded man fell face-up on a sidewalk underneath the elevated train tracks. 
 
 A garbage can fire burned as officers counted shell casings and draped tape from support pillars holding up the "L" tracks. A fire engine backed down the alley, and firefighters dumped the trash and pumped water from a tin can onto the smoldering waste. 
 
 Other scenes from the weekend 
 
 • The only shooting north of North Avenue happened about 50 yards from the street that marks the West Side's northern edge. 
 
 A 56-year-old man died and a 19-year-old man was seriously wounded around 8:15 p.m. Tuesday in the 1600 block of North Major Avenue -- the same block where an 8-year-old girl was shot last August. The house where the two men were shot was home to a young man killed last year around the corner. The older man was pronounced dead overnight at Loyola University Medical Center. 
 
 Tuesday night, a man approached the crime scene with a toddler, who seemed to be just learning to walk as she ambled ahead of him. An officer walked up to the little girl and gently turned her around, while another yelled at her father for walking under yellow tape officers had stretched across Major Avenue. 
 
 • Seven miles to the south, shortly before midnight, a woman searched the 1900 block of South Spaulding for shell casings by the light of her cellphone before officers arrived. Two people walked into St. Anthony's Hospital, a block from Mount Sinai Hospital, saying they had been shot there. 
 
 • Earlier Tuesday, officers found a woman shot on Roosevelt Road. She was in a silver car just east of Independence Boulevard and had been shot around the corner, on Lawndale Avenue. Every few minutes, officers found a few more shell casings, each a little farther from the alley south of Roosevelt.
– It was a long and bloody weekend in Chicago, where police say at least 102 people were shot between Friday afternoon and early Wednesday, 15 of them fatally. Police say they're "perplexed" and "frustrated" by the scale of the gun violence, which comes after a relatively peaceful Memorial Day weekend, reports the Chicago Tribune. Almost half the shootings happened in the last 12 hours of the long weekend, between 3:30pm Tuesday and 3:30am Wednesday. According to Tribune data, 72 people were shot over the Fourth of July weekend in 2013, which was the last time it spanned four full days. The deployment of an extra 1,300 police officers in the city failed to stop the violence, the BBC reports. Police spokesman Anthony Guglielmi says many of the shootings happened when petty disputes escalated into somebody pulling a gun. "People drinking all day and then things escalating ... It's just enormously frustrating," he says. Guglielmi says a review of the weekend will include a look at whether the new "ShotSpotter" system, which tries to quickly deploy officers when shots are heard, might have been affected by fireworks. (President Trump has sent more federal agents to the city.)