Washington (CNN) — Immigration and Customs Enforcement arrests at US airports are raising alarm among attorneys who say they are happening more frequently, citing a series of incidents where passengers have been abruptly swept up by agents when they’re traveling.

The federal agency, which is charged with the arrest and deportation of undocumented immigrants, remains under pressure to deliver on President Donald Trump’s deportation agenda. That includes meeting the administration’s goal of around 2,000 arrests a day.

Arrests at airports are part of a broader effort by ICE agents to use various enforcement tactics to increase arrests, including most recently, focusing on people with expired visas who are traveling.

This month, for example, a woman was detained at a Washington, DC-area airport on her way home to Texas to gather with family for her father’s funeral, according to Joe Moravec, an immigration attorney who’s representing her. The woman, who asked not to be identified, entered the US legally and is in the asylum process. She is now being held in Virginia.

Moravec said another one of his clients was detained at a Chicago airport. That client was also legally in the United States and is now being held by ICE, he said.

A DHS spokesperson said in a statement to CNN that “this administration is working diligently to ensure that aliens in our country illegally can no longer fly unless it is out of our country to self-deport.”

“Not that an airport is a sacred place, but for sure, enforcement at airports is nothing we’ve ever seen, neither is cooperation between TSA and ICE,” said Jeff Joseph, president of the American Immigration Lawyers Association.

“That’s the mousetrap. That’s the cheese,” he added, referring to people who are in the immigration process and being detained at airports. “If the new expectation is that if you have a pending application, you can’t travel … that would be very, very new.”

Senior Homeland Security officials made changes to their enforcement operations on the heels of two fatal shootings involving ICE officers this month. Both incidents, one in Houston and another in Maine, started when ICE initiated traffic stops. While arrests at airports are not a new strategy under the Trump administration, it’s one that lawyers and advocates say is increasingly happening.

“When you’re under pressure to ramp up arrests, it’s all about what is the fastest and easiest way to get people into custody,” said John Sandweg, former acting ICE director under the Obama administration.