Russian President Vladimir Putin has thanked his US counterpart Donald Trump for the CIA’s help in foiling a plot to attack the city of Saint Petersburg, the Kremlin said.

Putin spoke by phone with Trump to thank him for intelligence supplied by the CIA which allowed Russia’s FSB security service to break up an Islamic state group cell that was planning a suicide attack on December 16, it said in a statement carried by Russian news agencies.

Putin also pledged that Russian security agencies would pass on any information received about terrorist threats to the United States and its citizens.

Police confiscated a large number of explosives used to make homemade bombs, automatic rifles, munitions and extremist literature, it said.