An illegal Salvadoran immigrant was arrested and charged with several sex crimes against a child in Massachusetts after reentering the country at an unknown time, ICE Boston announced on Monday.

According to ICE Boston, agents successfully apprehended unlawfully present 28-year-old Salvadoran national Bryan Daniel Aldana-Arvelo, and charged him with numerous sex crimes against a child on Nantucket Island. 

"Bryan Daniel Aldana-Arevalo stands accused of some detestable and disturbing crimes against a Nantucket child," said ERO Boston Field Office Director Todd M. Lyons in a statement.

"He represents a significant danger to the children of our Massachusetts communities. ERO Boston will not tolerate such a threat to the most vulnerable of our population. We will continue to prioritize the safety of our public by arresting and removing egregious noncitizen offenders from our New England neighborhoods," Lyons continued.

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Authorities said Aldana unlawfully entered the United States on an unknown date, at an unknown location, without having been inspected, admitted or paroled by a U.S. immigration official.

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Nantucket authorities arraigned Aldana on July 26 in Nantucket District Court for one count of rape of a child with a 10-year age difference and two counts of indecent assault and battery on a child under 14.

The Nantucket District Court released Aldana on bail July 29.

Officers from ERO Boston arrested Aldana on Sept. 10 in Nantucket and served him with a notice to appear before a Department of Justice immigration judge. 

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Last week, ICE Boston conducted an operation in Nantucket targeting several "egregious" illegal immigrant sex offenders, resulting in several arrests. This is the first arrest ICE has announced as a result of that operation. 

"ERO Boston can confirm that we have been conducting targeted enforcement actions in coordination with Nantucket Police in Nantucket, Massachusetts. The actions, which targeted several egregious noncitizen offenders, have been going on for the last few days and wrapped up this morning," ERO Boston Spokesperson James Covington said in a statement issued to Fox News Digital. 

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"ERO Boston would like to thank the Nantucket Police for their cooperation and support throughout this process. As many aspects of the analysis remain ongoing, ERO will not comment further at this time. ERO Boston will release further details in the coming days," Covington said.

Authorities said Aldana remains in ERO custody.

Former President Trump is pledging to "save our cities" from what he has called a "migrant invasion," outlining his plans to cut a number of migrant programs if re-elected to the White House – amid an ongoing debate over Haitian migration.

"As President I will immediately end the migrant invasion of America," Trump said in a social media post on Sunday.

Trump has spent much of his election campaign promising to secure the southern border. Last week he said he wants to be known as the "border president" and has previously promised to launch a mass deportation effort.

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However, on Sunday he also refocused on broader migration policies, some not directly related to the southern border or illegal immigration – including the ending of the Biden-era use of humanitarian parole and the suspension of refugee resettlement.

"We will stop all migrant flights, end all illegal entries, terminate the Kamala phone app for smuggling illegals (CBP One App), revoke deportation immunity, suspend refugee resettlement, and return Kamala’s illegal migrants to their home countries (also known as remigration)," he said.

The remarks came after the influx of Haitian migrants into the small town of Springfield, Ohio, was in the spotlight. At last week's presidential debate, Trump echoed viral claims that migrants had been seen eating pets and animals.

"In Springfield, they're eating the dogs, the people that came in, they're eating the cats," Trump said. "They're eating the pets of the people that live there."

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Officials in Springfield have denied that claim, saying there is no evidence or substantiated reports of such incidents. But local residents have expressed concern and anger about the impact that the influx of many more than 12,000 migrants from the impoverished country has had on their community.

Trump’s proposals identified ways to limit the number of pathways for those, including Haitians, to enter or stay legally in the U.S. and which have been either created or expanded under the Biden administration.

Trump’s reference to migrant flights appears to refer to the Cuban, Haitian, Nicaraguan and Venezuelan parole processes, which allow up to 30,000 migrants from those countries to enter each month and be paroled into the U.S. for 18 months. Trump could both end CHNV, and also limit the renewal of the parole authorization.

Trump also mentioned ending "deportation immunity," referring to Temporary Protected Status, which shields nationals of designated countries from deportation and offers them work permits. Homeland Security Secretary Alejandro Mayorkas most recently extended and redesignated Haiti for TPS until February 2026. 

The City of Springfield said in an official FAQ that the approximately 12,000-15,000 immigrants in the city from Haiti arrived via parole and are protected via TPS.

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Trump also said he would end the use of the "Kamala phone app" – the CBP One app. The app was introduced during the Trump administration, but was expanded by the Biden administration to allow migrants to make appointments to be paroled into the U.S. at ports of entry. Currently, about 1,450 migrants are being paroled into the U.S. each day under the app. Republicans have said its use has been an abuse of parole – which is limited to a case-by-case basis for significant public benefit or urgent humanitarian need.

Trump also promised to suspend refugee resettlement, which dropped to lows under the Trump administration. In the last year in office, the administration set a cap of just 15,000 a year. That has expanded to a cap of 125,000 under President Biden.

"I will save our cities and towns in Minnesota, Wisconsin, Michigan, Pennsylvania, North Carolina, and all across America. #MAGA2024!" Trump said in his social media post.

The plans would be a stark contrast from the Biden administration, which has significantly expanded its "lawful pathways" as part of its strategy to deal with the historic crisis at the southern border. It has also criticized Trump for not supporting a bipartisan bill that would have increased funding to border agencies and limited some arrivals into the U.S. if they reached a certain level.