A federal judge has temporarily blocked the Trump administration's attempt to deport pro-Palestinian activist Mahmoud Khalil, who was arrested over the weekend by immigration agents.

Mr Khalil, a Columbia University graduate and permanent US resident, played a key role in last year's Gaza war protests at the Ivy League campus in New York City.

The arrest is part of President Donald Trump's pledge to crackdown on pro-Palestinian protesters on college campuses, in what he called "the first arrest of many to come".

Protesters gathered in New York City on Monday afternoon pushing for Mr Khalil's release and condemning the Trump administration's actions.