Dozens of students staged a walk-out when US Vice-President Mike Pence rose to address a commencement ceremony at the University of Notre Dame in South Bend, Indiana.

Student activist group We Stand For said the protest was against his policies which, they say, marginalised people for their religion, race or sexual orientation.

In his address, Mr Pence decried the "increasing intolerance and suppression" of free speech that he said was sweeping university campuses.