Trump's comments came hours after he claimed that former President Barack Obama shared "classified information"' when he told a podcaster recently that he believed aliens were real.

US President Donald Trump, citing "tremendous interest," said he was directing the Pentagon and other government agencies to release files related to extraterrestrials and unidentified flying objects ...

Asked about Mr Obama’s comments earlier on Thursday, Mr Trump said the former president “gave classified information. He’s not supposed to be doing that”.