America's intelligence service, the CIA, warned Russia that an attack was being planned on St Petersburg's Kazan Cathedral, an iconic Russian Orthodox Church.
President Putin thanked President Trump in a phone call, confirmed by the White House Press Secretary Sarah Huckabee Sanders.
Readout of President Trump's call with President Putin-> pic.twitter.com/tIM6sBrUb4
— Sarah Sanders (@PressSec) December 17, 2017
The Federal Security Service of the Russian Federation said in a statement that an attack was planned for 16th December and added that they had detained seven suspects and confiscated a large amount of weapons and extremist literature.
They also said: "The laboratory for the manufacture of explosive devices has been eliminated."
The White House issued a statement saying: "Russian authorities were able to capture the terrorists just prior to an attack that could have killed large numbers."
It added that working together was mutually beneficial.
"Both leaders agreed that this serves as an example of the positive things than can occur when our countries work together," the statement said.
