US President Donald Trump reiterated Friday that he was not accusing Britain of spying on him, after allegations against one of London's spy services that his spokesman had seemed to support on his behalf.

He also joked with German Chancellor Angela Merkel during a joint press conference that they had "something in common" in terms of wiretapping -- hinting that the administration of his predecessor Barack Obama was to blame.

Trump has accused Obama of ordering wiretaps at his Trump Tower in New York. 

In 2013, former National Security Agency contractor Edward Snowden revealed that Merkel's mobile phone was under US