The raid was apparently conducted based on information received by Sweden’s counterintelligence agency, the Swedish Security Service (SAPO), coupled with tips from the United States Federal Bureau of Investigation (FBI). The targets of the operation were Sergei Nikolaevich Skvortsov and Elena Mikhailovna Kulkova, a Russian-born married couple, who moved to Sweden from Russia in 1999. According to their identity documents, Skvortsov was born in Perm on July 28, 1963, and Kulkova in Moscow on May 22, 1964.

Both Skvortsov and Kulkova are university-educated, with a background in science, mathematics and cybernetics. Upon settling in Sweden, they worked in the import-export technology sector. By 2013 they had become Swedish citizens and had a son. Kulkova also had a daughter from a previous marriage. The Russian investigative source The Insider reports that Kulkova’s daughter’s boyfriend worked for Swedish military intelligence.

Swedish authorities allege that the two suspects migrated to Stockholm on orders of the Main Directorate of the Russian Armed Forces General Staff, known as GRU. The GRU allegedly did not activate them until after they had acquired Swedish citizenship. According to the court indictment, Skvortsov and Kulkova began to actively spy against the United States in 2013 and against Sweden in 2014.

Some sources claim that the case of the Russian couple may be connected to the recent arrests of Payam and Peyman Kia, two Iranian-born Swedish brothers, who were arrested in 2021 and are now facing charges of engaging in espionage on behalf of the GRU. Payam Kia worked for SAPO and had access to classified information from a host of Swedish government agencies. SAPO reportedly launched the probe in 2017, following suspicions that it harbored a spy in its personnel ranks.