The report suggested that militants could target buildings bearing his name in gold, abduct workers associated with his enterprises for ransom or worse.

Reports show that several potential executive actions and announcements are expected today as Trump in an interview with the Times of London during his inauguration weekend said that he considered Monday his first "real" work day.

Trump's visit -- he was greeted with enthusiastic applause by employees -- is seen as part of a bid to mend fences after he strained relations with intelligence officials by repeatedly casting doubt on their assessment that Russia carried out cyber-attacks during the US presidential election campaign.

While Trump was taking oath as 45th US President, Twitter users were having the time of their life with funny memes, reactions, and quotes. We take a look at some of the good ones for a good hearty laugh.

Donald Trump has sworn in as 45th president of the United States and the world is already thinking. Newsheads take a look at what leaders across the world are saying about America's new 'controversial' leader.

"This has been the privilege of my life, and I know I speak for Michelle as well," EFE news quoted Obama as saying with former First Lady Michelle Obama at his side on the tarmac at Joint Base Andrews, just outside Washington.

The dollar index, which measures the greenback against six major peers, decreased 0.37 per cent at 100.78 in late trading on Friday.

Trump's White House new website maintains a page where it says the visitor records will be posted, The Washington Times reported.

The website was transformed to remove all traces of former President Barack Obama's climate change initiatives and to reinforce border protection policies.

The new head of state put his signature to a measure passed by Congress exempting Trump's nominee for Defence Secretary, retired Gen. James Mattis, from a law requiring a person to be out of the armed forces for seven years prior to becoming head of the Pentagon, EFE news reported.