Hundreds of people gathered at LaGuardia airport in New York City late Wednesday to protest the Trump administration’s practice of separating migrant families, and to welcome any separated children who might arrive.

The American Civil Liberties Union (ACLU) posted photos and videos of demonstrators in the terminal holding up signs both expressing support for immigrants and condemning the Trump administration’s policies.

We will not stand by as the Trump administration attacks children and criminalizes immigrants. We are here to say #FamiliesBelongTogether," the ACLU tweeted, along with a photo of protesters at the airport.

We will not stand by as the Trump administration attacks children and criminalizes immigrants.



We are here to say #FamiliesBelongTogether. pic.twitter.com/toV9l8NcID — ACLU (@ACLU) June 21, 2018

The crowd size at LaGuardia Terminal B is now in the hundreds as people gather to witness and monitor the arrival of kids who were separated from their families #FamiliesBelongTogether #FreedomforImmigrants pic.twitter.com/WHH7vpeCWF — ACLU (@ACLU) June 21, 2018

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The Washington Post reported that protesters began gathering amid rumors that some separated children would be arriving on flights from Texas and other border areas. Demonstrators had not seen children getting off planes as of 1 a.m.

Multiple airline companies, including Frontier Airlines, United Airlines and American Airlines, said Wednesday they would no longer knowingly allow the government to use their planes to transport separated family members around the country.

The airlines added to the growing pushback in recent days against the Trump administration's "zero tolerance" policy toward illegal immigration.

In the face of mounting pressure from dozens of lawmakers, President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE signed an executive order on Wednesday to halt the practice of family separation. The decision followed days of administration officials claiming only Congress could address the issue.