US immigration authorities will carry out mass arrests of undocumented immigrants across the country on Tuesday, a top border official in the incoming administration of Donald Trump has said.

Donald Trump's incoming U.S. presidential administration plans to intensify immigration enforcement nationwide soon after he takes office on Monday, a person with knowledge of the plans said. "We’re going to be doing operations all across the country,

The size of the planned immigration raids is unclear, but they would be the opening step in the president-elect’s goal of overseeing the largest deportation program in history.