Swiss police intercepted two Russians, suspecting they were heading to the resort town of Davos as a precursor to last year's World Economic Forum (WEF) spying activities.

Two unidentified people, holding Russian diplomatic passports, told police they were staying in the luxury resort town of Davos for three weeks, from August 8 to 28 last year, Swiss media reported. reported on 21/1. One claimed to be plumber, raising suspicions that they were spies.

"Both carry Russian diplomatic passports but are not registered as official diplomats in Switzerland," said Anita Senti, a police spokesman in the state of Graubuenden, eastern Switzerland. Both were blocked but not arrested.

The information was revealed when the WEF Annual Meeting, being held in Davos on January 21-14, brought together the world's top political and business leaders, including US President Donald Trump and Prime Minister. German General Angela Merkel.

Russia denied accusing the Russians of espionage at the WEF. "We have not received any information about this from the Swiss authorities. There is no evidence of espionage," Stanislav Smirnov, spokesman for the Russian Embassy, said, adding that they could carry it for them. Russian diplomatic passport but not necessarily authorized in Switzerland.

When asked about one of the two claiming to be plumber, Smirnov said that could be "silly joke" of this person.

Swiss newspaper Tages Anzeiger said that the two may be preparing for eavesdropping or hacking at Davos.

The newspaper said the Swiss Attorney General's office did not bring a criminal charge. But Switzerland has demonstrated that the two plan to attack the network at the Spiez lab in Bern, where the analysis of the Prohibition of Chemical Weapons (OPCW) is carried out. At that time, the laboratory was investigating the poisoning of Russian spy Sergei Skripal with a nerve agent.

Swiss authorities also suspect Russia has been behind a cyber attack on the Lausanne office of the World Anti-Doping Agency (WADA), which has been detecting doping scandals in Russian sports for years.

WADA, based in Montreal, Canada, suspended Russia's Anti-Doping Agency in 2015 for not cooperating fully in the investigation of sports fraud at the Winter Olympics in Sochi 2014. The organization imposed a ban. Russia participates in world-class sports for four years.