Lorenzo Salgado Araujo shot and killed by ICE agent in Houston, authorities confirm: Live updates

President Donald Trump has overturned the temporary pause on U.S. Immigration and Customs Enforcement traffic stops, according to a source familiar with the discussion, allowing them to resume.

This comes after Homeland Security Secretary Markwayne Mullin issued a directive to halt traffic stops, a law enforcement source told ABC News on Tuesday.

In an email sent to ICE deportation officers, a senior ICE official wrote that the vehicle stops were paused "immediately," according to the email reviewed by ABC News.

"All personnel are instructed to prioritize other existing operational methods, outside of vehicle stops, to conduct immigration enforcement activities," the official wrote.

Multiple sources said the pause was temporary and that ICE officers would receive new training on vehicle stops.

Additionally, one source said that ICE officers can conduct some vehicle stops during the pause, but only in the presence of a local law enforcement officer trained to make vehicle stops who partners with ICE under the agency's 287(g) program.

A Department of Homeland Security spokesperson told ABC News that the agency won't "disclose or discuss law enforcement tactics," but added that it's "always evaluating our procedures to keep our officers safe and criminals off our streets."

In an interview on Fox News, border czar Tom Homan confirmed the temporary pause and said DHS will review the past few incidents.

"It is not a policy change, it is a temporary pause," Homan said. "Look, the last couple of shootings, ICE leadership, along with DHS, wants to look at these last couple of incidents and look, is there something that could have been done better? Is there any training that could be improved? Or is ICE simply doing their job, and bad things happen when people don't comply with law enforcement officers? I think it going to be a short pause, and I am confident that ICE is well trained in vehicle stops and you're going to see us keep moving forward."

On Monday, 25-year-old Johan Sebastián Guerrerowas fatally shot by an ICE agent in Biddeford, Maine, after agents tried to stop the car he was driving, according to Sen. Angus King, I-Maine.

Guerrero, a Colombian national, was not the target of the operation, and ICE agents had been given a final order for another man they were targeting to be removed from the U.S., King told ABC News.

An ICE spokesperson said that the agency was "conducting targeted surveillance on the last known address of an illegal alien with a final order of removal," and when an "illegal alien departed the residence in a vehicle," ICE agents "attempted to conduct a vehicle stop."

"The vehicle attempted to flee the scene, and fearing for public safety, an officer discharged his weapon," ICE said.

The Maine Attorney General's Office said: "The suspect attempted to flee in the vehicle in the direction of the officer and was fatally shot."

Witness Daniel Boucher told ABC News that he watched agents pull the shooting victim from his car and put him on the ground.

"I heard the young man say, 'I tried to stop.' I clearly heard him say that," said Boucher, adding that he overheard one of the ICE agents allegedly say the driver tried to run him over.

The Federal Bureau of Investigation filed a search warrant to look through the van that was part of a deadly shooting involving a U.S. Immigration and Customs Enforcement agent, records show.

This comes as authorities said they saw "white crystal-like substance packaged in small plastic bags," from outside of the van, according to documents.

The search warrant, which was filed July 14, states that "searches of the target vehicle will yield evidence of the crimes committed and violations of drug offenses."

As the investigation continues into the deadly shooting, in the warrant the FBI said that the Department of Homeland Security told them ICE agents were trying to conduct a traffic stop on the "target vehicle," but it refused to stop and drove over a median in an attempt to flee.

"Pursuant to ICE policy, the officers did not pursue the vehicle. The officers relocated the vehicle in the 6800 block of Canal Street," the warrant states.

However, videos obtained by ABC13 showed two unmarked vehicles following the van on Wayside at Navigation, then turning onto Canal Street.

Following the deadly shooting, an FBI special agent says he "inspected the vehicle and observed in plain view several plastic bags with what appeared to be white crystal-like substances packaged in small plastic bags," according to the warrant.

The FBI states that the bags were found in the middle of the dash, between the driver and passenger side of the vehicle, as well as on the passenger floorboard, and that "the packaging and appearance of the controlled substance in the target vehicle is consistent with methamphetamine."

President Donald Trump says Immigration and Customs Enforcement should continue traffic stops after recent fatal shootings.

President Donald Trump says Immigration and Customs Enforcement should continue traffic stops after recent fatal shootings, seeming to contradict a new policy to halt them.

Trump wrote early Wednesday on his social media site ICE is "doing a GREAT job, one that has to be done."

The Republican president says to remove criminals he says were let into the country under the previous Democratic administration "we must be strong, tough and smart and we CANNOT give up one of ICE's most important and effective Crime Fighting tools, THE TRAFFIC STOP!" Trump says, "Once we do, we are playing right into the criminal's hands."

The policy change came after an ICE officer shot and killed a Colombian driver Monday in Maine and a week after one shot and killed a motorist in Houston, renewing criticism of the agency's enforcement tactics that were widely condemned last winter after the killings of Alex Pretti and Renee Good in Minnesota.

In Florida on Tuesday, a third man in roughly a week died during an encounter with immigration officers. This time, a 28-year-old man was killed after he was hit by a tractor trailer while running from immigration and other federal officers, authorities said.

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Following two deadly shootings involving Immigration and Customs Enforcement agents in Texas and Maine, the Department of Homeland Security is now stating that ICE will ensure each "arrest team has an individual body camera."

This comes after it was reported that the agents involved in the shootings that killed 52-year-old Lorenzo Salgado Araujo and 26-year-old Joan Sebastian Guerrero were not wearing body cameras.

"Ensuring all of our ICE law enforcement officers have body cameras nationwide is a top priority for DHS-especially given the increase in attacks against our law enforcement, including a more than 1,300% increase in assaults against them and a 3,300% increase in vehicle attacks," according to a DHS spokesperson.

In addition, ICE has also been told to pause most vehicle stops in the days following the shootings, according to sources.

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