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Graduates boo Columbia University head over protester's detention

Columbia University President Claire Shipman was booed during a graduation ceremony on Tuesday, with chants of "Free Mahmoud" heard drowning her out.

Mahmoud Khalil, a Columbia University graduate was detained by US immigration officials in March over his role in pro-Palestinian protests on campus. He is a permanent legal US resident and has not been charged with a crime.

Mr Khalil remains in detention in the US while official seek to deport him.

President Donald Trump has called past pro-Palestinian protests antisemitic, but student activists deny this.