Rep. Lauren Boebert, R-Colo., yelled at President Biden during his first State of Union address to condemn him for the 13 American service members who were killed during the deadly withdrawal of Afghanistan.

Biden was speaking of helping soldiers who came home sick from Iraq and Afghanistan because of toxic burn pits and the cancers that would one day put them in a "flag-draped coffin."

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Boebert yelled at Biden from the audience: "You put them in, 13 of them," in reference to the 13 flag-draped coffins that came home from Afghanistan after the deadly and chaotic U.S. withdrawal from Afghanistan over the summer.

Representative Lauren Boebert, a Republican from Colorado, arrives to a State of the Union address by U.S. President Joe Biden at the U.S. Capitol in Washington, D.C., U.S., on Tuesday, March 1, 2022. Biden's first State of the Union address comes against the backdrop of Russia's invasion of Ukraine and the subsequent sanctions placed on Russia by the U.S. and its allies. (Win McNamee/Getty Images/Bloomberg via Getty Images)

The outburst drew some boos from the audience.

At another point, Boebert and Rep. Marjorie Taylor Greene, R-Ga., started chanting "build the wall" when Biden was talking about immigration.

Greene delivered her own State of the Union response where she blasted Biden for a "wide-open border" with Mexico.

She said an uncompleted border wall and lax immigration policies have made the United States less safe and more people at risk for fentanyl poisoning.

"Joe Biden is a great business partner to the Mexican cartels," Greene said in her speech.

Rep. Marjorie Taylor Greene, R-Ga., talks as President Joe Biden delivers his first State of the Union address to a joint session of Congress, at the Capitol in Washington, Tuesday, March 1, 2022. (AP Photo/J. Scott Applewhite, Pool) (AP Photo/J. Scott Applewhite, Pool)

Boebert, a firebrand freshman member, also wanted to send a message to Biden to boost domestic oil production and stop funding Vladimir Putin's war by buying Russian oil.

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Boebert wore a "Drill Baby Drill" outfit to Tuesday night's address as Republicans pressure Biden to roll back restrictions on domestic energy production and restart the Keystone XL pipeline.

"Ramping domestic energy production will tame inflation, boost our economy, and secure the safety and security of the United States of America and our allies," Boebert told Fox News Digital.

President Joe Biden delivers his State of the Union address to a joint session of Congress at the Capitol, Tuesday, March 1, 2022, in Washington. (Saul Loeb, Pool via AP) (Saul Loeb, Pool via AP)

It's not the first time Boebert has made a fashion statement. She donned a "Let's go Brandon" dress to meet former President Trump at a Mar-a-Lago event. That's been the slang for "F--k Joe Biden."

The jeers drew backlash from some fellow members of Congress.

"Boorish, rude, absolutely disgraceful. There is a First Amendment but there is also decorum and respect for the commander in chief and president of the United States," Rep. Sheila Jackson Lee, D-Texas, said of the comments.

Rep. Lauren Boebert, R-Colo., left, and Rep. Marjorie Taylor Greene, R-Ga., right, scream "Build the Wall" as President Joe Biden delivers his first State of the Union address to a joint session of Congress at the Capitol, Tuesday, March 1, 2022, in Washington. (Evelyn Hockstein/Pool via AP)

Sen. Mike Braun, R-Ind., also criticized the interruptions. "I think that whenever you do that, regardless of who's doing it, directed at which president, which party, probably not the right thing to do," Sen. Mike Braun told Fox News.

Fox News' Tyler Olson and Jason Donner contributed to this report.

Boebert wears 'Drill Baby Drill' outfit to SOTU, yells at Biden over 13 troops killed in Afghanistan pullout

Lauren Boebert was joined by Marjorie Taylor Greene while heckling Biden during the state of the Union