The statement came after Trump tweeted, "Crime and killings in Chicago have reached such epidemic proportions that I am sending in Federal help".
Chicago Police Department officials planned a news conference Friday afternoon to announce the permanent expansion of the Chicago bureau of the Department of Alcohol, Tobacco and Firearms, spokesman Anthony Guglielmi said.
Chicago police officials said the unit would focus on preventing illegally possessed guns from flowing through the city and on targeting people repeatedly involved in gun crimes, both of which have always been cited as drivers of the violence.
Additional federal support to Chicago has been in the works for several months, according to police officials.More news: The one reason Alvaro Morata is leaving Real Madrid for Man United
There have been 320 murders in Chicago so far this year.
Shortly after he assumed office, President Trump tweeted "If Chicago doesn't fix the terrible "carnage" going on, 228 shootings in 2017 with 42 killings (up 24% from 2016), I will send in the Feds!".
Trump said there have been "1714 shootings in Chicago this year!" but the number is actually higher, according to data kept by the Tribune. But as the police department released figures that show the number of homicides, shooting incidents and shooting victims has dropped, Collins said "the progress CPD has made this year has happened without any of the new resources from the federal government we requested".
Chicago police Superintendent Eddie Johnson said in a statement "we are foundationally changing the way we fight crime in Chicago".More news: India, Portugal launch startup hub in first Indian PM visit
"The police have been demoralized in many ways", he said. He adds that unlike previous bureau "surges" in Chicago-where 306 people have already died this year from gun violence-these agents are "here permanently".
"No child in America should have to walk the streets of their neighborhood in fear of violent criminals, and yet in Chicago, thousands of children do every day". And police, federal agents and prosecutors will reportedly target repeat gun offenders and illegal firearms.
Sessions is also blaming spikes in violence on so-called sanctuary city policies. But Chicago was not among them.
Trump, according to Conway, has discussed the issue with Chicago Mayor Rahm Emanuel, however.More news: Saints' Fairley to miss 2017 season with heart problem