"Vladimir Putin assured Donald Trump that the Russian intelligence services upon receipt of information relating to terrorist threats against the United States and its citizens, will immediately transmit to its American colleagues in partner channels", the statement added.
The group was preparing explosions targeting the cathedral and other public places in Russia's second city, the Kremlin statement said on Sunday.
According to Russian media, Putin also reassured Trump that Russia's intelligence service would transmit any information pertaining to the attacks on the U.S. to the White House, as it had done in the past. "Both leaders agreed that this serves as an example of the positive things that can occur when our countries work together", the White House said.
The Russian leader reassured the USA president that "Russian security services, should they have information about possible terrorist threats to the United States and its citizens, will swiftly and unconditionally share it with the U.S. colleagues via partner channels", the press service stressed.
Police confiscated a large number of explosives used to make homemade bombs, automatic rifles, munitions and extremist literature, the Kremlin said.
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Putin told Trump the information helped lead to the arrest of terrorists that had planned an attack on the city of St. Petersburg, according to Russia's TASS news agency.
US President Donald Trump criticized Russia Friday for not doing enough to pressure North Korea to halt its nuclear weapons program.
Three other men were arrested in St. Petersburg on December 14. Trump was additionally made a request to forward Putin's thankfulness to CIA Director Mike Pompeo and the knowledge authorities who got the data.
"The US President expressed gratitude to the Central Intelligence Agency on Putin's request for the work done on prevention of a terror attack".