CHICAGO — Chicago police, federal agents and prosecutors are launching a new initiative Friday to stem the flow of illegal firearms in the city as part of efforts to curb rampant gun violence that President Donald Trump says is at "epidemic proportions."

Trump's remark on Twitter came ahead of an announcement by Chicago police and the Bureau of Alcohol, Tobacco, Firearms and Explosives about the formation of the Chicago Crime Gun Strike Force. The Chicago Sun-Times reported 20 additional ATF agents have been sent to Chicago.

State police, intelligence analysts and state and federal prosecutors will target illegal guns and repeat gun offenders, Chicago police said. Superintendent Eddie Johnson said in a statement Thursday night that "we are foundationally changing the way we fight crime in Chicago."

Trump tweeted Friday morning that "Crime and killings in Chicago have reached such epidemic proportions that I am sending in Federal help." In January, he warned Chicago about its high number of homicides, saying on Twitter that he is ready to "send in the Feds."

Trump's latest tweet said there have been 1,714 shootings in Chicago this year. The Sun-Times said its count showed 1,737 people have been shot in 2017, including 306 who died. The Associated Press sent a message to a police spokesman seeking their most recent count.

Police and federal officials note, however, that efforts to curb gun violence in Chicago have been cooperative — and are ongoing. Under the new effort, the federal prosecutors and prosecutors from Cook County will work on new strategies to prosecute gun crimes and offenders.

Attorney General Jeff Sessions, speaking Friday on the Fox News Channel's morning show, "Fox & Friends," said the Justice Department is "sending in additional gun investigators" to Chicago and that he has urged the U.S. attorney's office to prosecute gun cases aggressively.

"The police have been demoralized in many ways," he said. "In many ways, the policies in Chicago have not been working. Murders are way, way too high. It is critical for the people of Chicago's public safety that we begin to work together here and deport violent criminals that have been convicted. They need to not be a sanctuary city, they need to be protecting the people of Chicago from violent criminals."

Sessions last week pledged federal assistance to 12 cities to help them develop individualized, long-term strategies to fight violence. But Chicago was not among them.

The Justice Department said that's because Chicago was already part of a similar Justice Department program called the Violence Reduction Network, which began in 2014. Under that initiative, federal agents teamed up with their local counterparts to share resources and intelligence.

The Justice Department spokesman said the department will keep working with cities including Chicago under the new crime-fighting program, called the Public Safety Partnership. And he noted that dozens of additional ATF agents had "surged" into Chicago so far this year.

Chicago Mayor Rahm Emanuel's office says the city welcomes the additional federal agents. Adam Collins said in an email that city police have made progress even "without any of the new resources from the federal government we requested."

Police figures show that the number of shooting incidents and victims have dropped from last year, although the number of shooting deaths is basically the same.

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