>> The Trump administration has moved to reopen the cases of hundreds of illegal immigrants who were given a reprieve from deportation under President Obama. Government data and court documents examined by Reuters, as well as interviews with immigration lawyers, illustrate one of the first concrete examples of the crackdown promised by Trump.

And is likely to stir fears among tens of thousands of illegal immigrants who thought they were safe from deportation. Reuters immigration correspondent, Mica Rosenberg.>> So we started reporting this story because we heard from immigration lawyers that they had cases that had been administratively closed by the government.

Which basically, for their purposes, were over. They didn't have to think about them again. And then they suddenly started receiving motions from the government saying they wanted to put these cases back on the court calendar. And, for some lawyers, this was very surprising, because they didn't know of any circumstances that had changed in their clients' cases.

>> In 2011, President Obama initiated a policy change to pull back from deporting immigrants who had formed deep ties in the United States and who were considered to be no threat to public safety. For President Trump undid those policies in January, and, now, immigration lawyers are seeing the widening effect of that executive order.

>> The Trump administration has said that they wanna focus on criminal aliens. That is their priority, but in the language of Donald Trump's executive order which was signed in January, it says no classes of immigrants in the country illegally should be exempt from deportation. So we spoke to one attorney who had a client whose case was closed, administratively in 2015.

And she, just a few months ago, got a motion that the government was seeking to put that case back on the calendar. She was confused as to what was happening, had some conversations with ICE, and they said that there had been an arrest in El Salvador on the woman's record.

So she went back through her file and saw that the arrest had been for the woman selling pumpkin seeds outside the airport as an illegal street vendor. And that was something that had been disclosed on her immigration application from the minute she crossed the border.>> One immigration lawyer telling Reuters that the government used to only reopen cases if the person was a threat to public safety, but now they are, quote, opening cases just because they want to deport people.