Trump to 'deport up to three million immigrants'

US President-elect Donald Trump said he planned to immediately deport or jail as many as three million undocumented immigrants, as he set out his priorities in the first television interview since his election.

The interview with US television CBS's "60 Minutes" is to be broadcast on Sunday as millions were expected to tune in for clues on how the billionaire businessman turned politician will govern the country.

Since Tuesday's election triumph, Trump had appeared to tone down his rhetoric, notably suggesting he might be willing to reconsider a pledge to scrap President Barack Obama's signature health reform, the so-called Obamacare.