Security on top of the Kongress Hotel in Davos, Switzerland during the 2020 World Economic Forum on Jan. 21st.

Swiss police reportedly believe they uncovered two Russian spies who had posed as plumbers in order to bug world leaders at Davos this week.

According to the Financial Times, Swiss police picked up two men at the high-end resort in August after the pair had aroused suspicion by staying for an unusually long time.

Zürich's Tages-Anzeiger newspaper reported that Swiss officials and police concluded that the pair were Russian spies employed by the Kremlin to record and tap into the conversations of important figures at the World Economic Forum.

Police told the Financial Times that the men claimed they had diplomatic protection, although they had not registered this with official Swiss authorities. The newspaper added that Swiss police found no indications of criminal acts.

A representative for the Russian embassy in Switzerland, Stanislav Smirnov, told CNBC via phone Tuesday that there had been no contact from Swiss authorities on the matter and that the story was "one more attempt to undermine Swiss-Russian relations."