Dozens of people were struck by gunfire in Chicago, some of them fatally, during the traditionally violent Fourth of July weekend, mostly in parts of the South and West sides that have always been plagued by gang crime and gun violence.Still, the nation’s third-largest city has seen almost 330 murders already this year, according to USA Today.The shootings came as the police department – as has become standard procedure during long holiday warm weather holiday weekends – put more than 1,000 extra officers on the street.The most recent fatality occurred early Wednesday morning, when a 42-year-old man was found on a sidewalk with multiple gunshot wounds to the body. Since 8 p.m. Tuesday, Chicago saw an incredible spike in the violence. After midnight, the violence continued, with 21 more shootings, six of them deadly. Detectives investigating the shootings “suspect several incidents were retaliatory in nature and alcohol was a factor in others”, he said.Estrada said it was hard to describe the weekend as a particularly difficult one for police. One of the latest shootings was near East 109th Street and South Eberhart Avenue in the city’s Roseland neighborhood, where two men were killed and two others were hurt Police had been carrying out anti-violence raids over the holiday, hoping to prevent the bloodshed.”Crime and killings in Chicago have reached such epidemic proportions that I am sending in Federal help”, he tweeted Friday.At least 101 people were shot in total between Friday afternoon and early Wednesday.On Friday, the Trump administration announced it would send 20 more ATF agents to the city and that the Justice Department would work with the city to form a joint strike force to prosecute gun-related crimes.In 2016, Chicago had more murders than New York City and Los Angeles combined.During a news conference Friday to discuss the department’s Fourth of July weekend deployment plans, as well as its new task force with federal law enforcement, Chicago police officials still expressed optimism over the reduction in the number of shooting victims.