Venezuelan President Nicolas Maduro, whose nearly 12 years in office have been marked by a deep economic and social crisis, was sworn in for a third term on Friday, staying in power despite a six-month dispute over an election and international calls for him to stand aside.

Donald Trump says Venezuela's embattled opposition leader must be protected, as President Nicolas Maduro prepares to take the oath again after allegedly stealing an election.

Nicolás Maduro took the oath before parliament, vowing his third six-year term in office would be a "period of peace".