President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE’s attacks on “fake polls” were met with shouts of “fake news” and “CNN sucks” during his remarks at the Young Black Leadership Summit.

Trump started his remarks by making a call for national unity in light of explosive devices being sent to Democrats and former intelligence officials.

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“The bottom line is that Americans must unify. We must show the world that we are united together in peace and love and harmony as fellow American citizens. There is no country like our country and every day we are showing the world just how truly great we are,” the president said.

However, after attacking what he called “fake polls,” members of the crowd responded by shouting “fake news” and “CNN sucks.”

The comments come after Florida resident Cesar Sayoc Jr. was arrested in connection with the mailing of 12 explosive devices that were addressed to various Democrats and former intelligence officials, including two that were sent to CNN’s offices in New York City.

Two devices were found Friday morning that were addressed to Sen. Cory Booker Cory Anthony BookerSunday shows preview: Lawmakers prepare for SCOTUS confirmation hearings before election The movement to reform animal agriculture has reached a tipping point Watchdog confirms State Dept. canceled award for journalist who criticized Trump MORE (D-N.J.) and former Director of National Intelligence James Clapper James Robert ClapperOn China, Biden is no Nixon — and no Trump The Hill's 12:30 Report - Speculation over Biden's running mate announcement Trump slams former intelligence officials to explain 'reluctance to embrace' agencies MORE. The one addressed to Clapper was sent to the CNN offices in New York, where he is a contributor.

Other devices were sent to Democratic donor George Soros, former Secretary of State Hillary Clinton Hillary Diane Rodham ClintonThe Memo: Trump furor stokes fears of unrest Bloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close MORE, former President Obama, former Attorney General Eric Holder Eric Himpton HolderThe Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements Obama endorses Warnock in crowded Georgia Senate race The Hill's Campaign Report: Trump's rally risk | Biden ramps up legal team | Biden hits Trump over climate policy MORE, former CIA Director John Brennan John Owen BrennanJournalism or partisanship? The media's mistakes of 2016 continue in 2020 Comey on Clinton tweet: 'I regret only being involved in the 2016 election' Ex-CIA Director Brennan questioned for 8 hours in Durham review of Russia probe MORE at the CNN offices in New York, Rep. Maxine Waters Maxine Moore WatersPowell, Mnuchin stress limits of current emergency lending programs Pelosi: House will stay in session until agreement is reached on coronavirus relief Omar invokes father's death from coronavirus in reaction to Woodward book MORE (D-Calif.), former Vice President Joe Biden Joe BidenBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Joe Biden should enact critical government reforms if he wins MORE and actor Robert De Niro.

Every addressee has criticized — and been criticized by the Trump administration.

“I think anyone who has in any way publicly been a critic of President Trump needs to be on extra alert and take precautions with respect to mail. At the same time we shouldn’t get too overblown about it, to overwrought about it … at this point. I have a lot of confidence in all the law enforcement elements involved in this,” Clapper said on CNN after the package addressed to him was discovered.

None of explosive devices have detonated and no injuries have been reported.