It’s on. 

Heavily armed federal immigration agents swept through the Big Apple under the cover of darkness early Tuesday to nab about 30 accused illegal-migrant killers and traffickers in the first deportation raids of President Donald Trump’s crackdown, sources told The Post.

New Homeland Security Secretary Kristi Noem — donning a protective vest and tooling around in an armored BearCat SWAT vehicle — joined agents from Homeland Security and Immigration and Customs Enforcement in the series of early-morning lighting raids.

The crackdown began with busts in The Bronx — and included the capture of a suspected violent Tren de Aragua gang leader.

Also nabbed was a national of the Dominican Republic who was the subject of an Interpol red notice — wanted for a double homicide in his home country, Fox said. 

The DEA alone busted five “career criminals,’’ federal sources said.

Noem attended a pre-raid tactical meeting before hopping into the military vehicle with HSI agents and being shuttled between locations.

“Dirtbags like this will continue to be removed from our streets.” Noem wrote online, sharing footage of the raids. 

“We are doing this right – doing exactly what President @realDonaldTrump promised the American people – making our streets safe.”

Noem said that among the first migrants picked up by the feds was “a criminal alien with kidnapping, assault and burglary charges.”

The busts targeted migrants with warrants against them for terrifying crimes including burglary, menacing, kidnapping, extortion, and various violent acts, police sources told The Post. 

The focus was just on “getting the bad guys out of the country,” a DHS rep told Fox News — saying the pre-dawn operation was aimed at rounding up accused “murderers, kidnappers, and individuals charged of assault and burglary.”

One raid early Tuesday woke residents of an Ogden Avenue apartment building in The Bronx with a loud boom.

“When they brought him out, he had shackles on his wrists to his feet,” said a woman who lives in the building but did not want to be named, referring to a nabbed suspected Tren de Aragua gang member.

“His face had a real angry expression. It was strange. I’ve lived here many years, and I’ve never seen him come in or out of the building,” she said.

Neighbors said they’d seen a woman and several children in the raided apartment.

“Everybody in the building is just asking who else are they coming for? How are they picking the people? Is it just people who have been in the system, who have been arrested? A lot of people don’t have their papers here, and there is a lot of fear,” she said.

“We need to know how they are picking the people that they are coming and getting.”

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Another neighbor called it “a big operation” led by Homeland Security officers, with the metal door to the raided apartment smashed in with a crowbar.

“They’re going to get due process. It doesn’t matter if, it doesn’t matter what crimes, there or they’re here illegally, they’re going to get due process, so it’s OK,” the resident said. “I’m not opposed. Whatever they allegedly did,” the neighbor said, noting the family living in the apartment that was raided consisted of a man, a woman, and several children.

A DHS official told The Post that Tuesday morning’s raids were “very successful” and ensnared some genuinely rough customers.

“You guys obviously reported — that Tren de Aragua member, a violent criminal [from a] very violent, ferocious gang. And then, not to mention, there was a guy picked up for a double murder, and then another individual as well,” the official said.

“This is a message that [the US] is not a safe haven for violent criminals. I think, overall, it was a very encouraging trip.”

As for DHS Secretary Noem going along for the morning raids, the official said her presence “sent a strong message,” calling it “good for morale” for ICE and the other enforcement agencies to see her out there on the front lines.

Noem has been peppered with criticism online — including from retired US Navy Admiral James Stavridis, who said on X that Noem’s participation “comes across as theater” and “just bogs down agents doing the work on the ground.”

Asked about the critique, the DHS official cited the need for “a huge cultural shift” in federal enforcement agencies, noting they’ve been “completely undermined and disincentivized from doing their job” under the Biden administration.

“Secretary Noem is going on the ground to confront things. She’s going to tell the American people that these are real-life horror stories. These are people who are in our communities. These are people who are amongst our families and children,” the official said.

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“You know, as much as the mainstream media wants people to turn away from that, they need to see it with their own eyes.”

Under the watchful eye of border czar Tom Homan, the feds have been rounding up hundreds of criminal migrants daily in sanctuary cities nationwide since Trump assumed office.

Agents have hit Chicago, Seattle, Atlanta, Boston, Los Angeles, and New Orleans as part of the effort to ship lawbreakers out of the country.

Homan warned on ABC News last Sunday that anyone in the country illegally is “on the table” for deportation.

“You’re going to see the numbers steadily increase, the number of arrests nationwide, as we open up the aperture,” he said. “Right now, it’s concentrating on public safety threats [and] national security threats. That’s a smaller population.

“So we’re going to do this on a priority [basis], that’s President Trump’s promise. But as that aperture opens, there’ll be more arrests nationwide.”

Trump loosened restrictions on how immigration officers can approach deportation raids, tossing out bans on searching churches, courthouses, and other “sensitive” sites that illegal migrants have historically holed up in to avoid landing on the feds’ radar.

Mayor Eric Adams said last week ahead of the crackdown that city officials would “coordinate” with ICE on handling migrant criminals, but they were still analyzing Trump’s new rule allowing raids in “sensitive” areas.

Adams has tried to assuage the worries of immigrant New Yorkers who are afraid of getting caught up in indiscriminate raids.

The embattled mayor has been asked to appear before the Congressional Committee on Oversight and Government Reform on Feb. 11 to answer to the city’s immigration policies.

The committee sent a letter this week summoning the mayors of four “sanctuary jurisdictions” — Boston, Chicago, Denver, and New York — all of which the note says “refuse to fully cooperate with federal immigration enforcement.”

City Hall responded to the letter in a statement Tuesday but has yet to definitively confirm whether Adams will attend as requested.

“Mayor Adams has made clear that New York City is committed to working with our federal partners to fix our broken immigration system and focus on the small number of people who are entering our localities and committing violent crimes. We will review the letter and respond accordingly.”

The NYPD sent out an internal memo obtained by The Post reminding cops they can partner with ICE on criminal investigations but not federal deportations, which are civil matters under the city’s “sanctuary” status.

ICE said it made 1,179 arrests and lodged 853 detainers Monday after it carried out 956 arrests and issued 554 detainers Sunday leading up to Tuesday’s Big Apple action.

Additional reporting by Jorge Fitz-GibbonandCaitlin Doornbos.