"President Putin of Russia called to thank me and the US for informing them of a planned terrorist attack in the very beautiful city of Saint Petersburg", Trump said via Twitter. "They were able to quickly apprehend the suspects, with many lives being saved. Great and important coordination!"
The White House and Kremlin said earlier that Putin had called Trump a few days earlier to thank him for the information that helped to prevent the terrorist attack in Russia.
On 29 December, the Russian Federal Security Service (FSB) said it had detained two Russian citizens for plotting an attack in St. Petersburg during the New Year's Eve celebrations.
In their phone conversation, both leaders also discussed the state of bilateral relations and efforts to strengthen arms control, according to Russian and US officials.