Police arrested anti-immigration enforcement demonstrators at Minnesota's largest airport Friday after they overstepped their permit, officials said, as a mass mobilization to protest the Trump administration's crackdown began across Minnesota despite Arctic temperatures seizing the state.

U.S. Immigration and Customs Enforcement agents will spend three weeks at MSP Airport, checking and verifying documents of both customers and employees, an airport employee said.

Activists are pressuring the local airport authority to block flights out of the airport, even though legal experts say it has no authority to do so.

Mistake at airport allows passengers to leave without clearing immigration - The passengers who arrived from Mexico were able to leave the airport without going through border control