President Trump and his administration is cracking down on international students who have been active in protests against Israel on university campuses.
Last week, the US Secretary of State Marco Rubio said at least 300 students had their student visas revoked.
Trump officials said the Immigration and Nationality Act allows the State Department to deport non-citizens who are "adversarial to the foreign policy and national security interests" of the US.
The arrests are a part of Trump's pledge to combat what the administration has classified as antisemitism on university campuses, which was written into an executive order in January.
Nathalie Jimenez, our reporter in the US, takes us through what we know about two of the most prominent cases.
And Jake Horton from BBC Verify, explains some of the key terms you need to know.
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Presenter: Hannah Gelbart
Producers: Emily Horler and Benita Barden
Editor: Verity Wilde
