The statement came after Trump tweeted, "Crime and killings in Chicago have reached such epidemic proportions that I am sending in Federal help".
Authorities confirmed Thursday to The Chicago Sun-Times about 20 additional agents with the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives have been sent to the city.
Twenty federal gun agents have been assigned to Chicago to join a newly formed task force aimed at cutting the flow of illegal guns into the city and cracking down on people repeatedly arrested on gun charges. There have been 320 murders, down from 322 over the same period past year.More news: Venus Williams blamed in fatal Palm Beach Gardens crash
Police figures show that the number of shooting incidents and victims have dropped from a year ago, although the number of shooting deaths is basically the same.
"But the progress CPD (Chicago Police Department) has made this year has happened without any of the new resources from the federal government we requested".
Crime and killings in Chicago have reached such epidemic proportions that I am sending in Federal help.
"We'll have an impact in reducing shootings in Chicago", he said, while saying police there are "demoralized" and city policies are not working. And this week, police officials said the A.T.F. was stationing a mobile ballistics lab in the city for part of the summer, the season when violence here traditionally peaks.More news: Saints place Nick Fairley on NFI list, will miss entire season
Joseph Ferguson, the city's inspector general, called on Chicago officials to agree to a consent decree to oversee changes to the department at a committee meeting on Tuesday - splitting with the mayor, who has said a court-enforced settlement is not necessary for reform. "They need to not be a sanctuary city, they need to be protecting the people of Chicago from violent criminals".
In February, shortly after Mr. Trump's inauguration, the A.T.F. announced that it would send more agents to Chicago.
State police, intelligence analysts and state and federal prosecutors will target illegal guns and repeat gun offenders.
Sessions has faced criticism for not including Chicago on a list of cities that will receive guidance from the Department of Justice (DOJ) about long-term strategies to fight violence.More news: Sebastian Vettel: Mercedes gap 'nothing to be afraid of'