Brazilian President Michel Temer has taken to television to deny a report that he laundered money and said he would urge his security minister to investigate how the allegations were leaked to the media.

Former Brazilian president Dilma Rousseff is slamming the process that led to her being ousted this week and promising to provide a strong opposition voice to the new government.

Michel Temer has been sworn in as Brazil's new president after Dilma Rousseff was ousted from office.