Donald Trump has announced he will be keeping Guantanamo Bay open, hinting he may send new prisoners to the notorious US jail.

During his State of the Union address , the US president announced that he had just signed an executive order on "protecting America through the lawful detention of terrorists”.

The executive order revokes former president Barack Obama's order to close the controversial detention facility and even opens the option of more suspected terrorists being held there.

The reversal was a long-standing campaign pledge by Mr Trump.

Mr Trump also vowed to use his powers to continue to detain any terrorists captured during armed conflict that the US deems to be a risk to the country.