McALLEN, Texas (AP) — Yaakub Vijandre was preparing to go to work as a mechanic when six vehicles appeared outside his Dallas-area home. Federal agents jumped out, one pointed a weapon at him, and they took him into custody.

Vijandre is a recipient of Deferred Action for Childhood Arrivals, the Obama-era program that has shielded hundreds of thousands of people from deportation since 2012 if they were brought to the United States as children and generally stayed out of trouble. The Trump administration said it targeted Vijandre over social media posts. The freelance videographer and pro-Palestinian activist described his early October arrest to his attorneys, who relayed the information to reporters.

His arrest and several others this year signal a change in how the U.S. is handling DACA recipients as President Donald Trump’s administration reshapes immigration policy more broadly. The change comes as immigrants face increased vetting, including of their social media, when they apply for visas, green cards, citizenship, or to request the release of their children from federal custody. The administration also has sought to deport foreign students for participating in pro-Palestinian activism.

DACA was created to shield recipients, commonly referred to as “Dreamers,” from immigration arrests and deportation. It also allows them to legally work in the U.S. Recipients reapply every two years. Previously if their status was in jeopardy, they would receive a warning and would still have a chance to fight it before immigration officers detained them and began deportation efforts.

In response to questions about any changes, Homeland Security Assistant Secretary Tricia McLaughlin issued a statement saying that people “who claim to be recipients of Deferred Action for Childhood Arrivals (DACA) are not automatically protected from deportations. DACA does not confer any form of legal status in this country.” DACA recipients can lose status “for a number of reasons, including if they’ve committed a crime,” she said.

McLaughlin also claimed in a statement that Vijandre made social media posts “glorifying terrorism,” including one she said celebrated Abu Musab al-Zarqawi, the al-Qaida’s leader in Iraq who was killed in a U.S. strike in 2006.

An attorney for Vijandre, Chris Godshall-Bennett, said Vijandre’s social media activity is “clearly” protected speech. He also said the government has not provided details about the specific posts in court documents. Vijandre’s arrest has raised concerns among pro-DACA advocates about the implications for other recipients. He remains detained, with the risk of deportation looming.