An employee of a Swedish high-tech company has been arrested on suspicion of spying for Russia.

The person, who has not been identified, was arrested in Stockholm on Tuesday evening, officials said.

Counter-intelligence chief Daniel Stenling said they believed the suspect was recruited by a Russian intelligence officer posing as a diplomat.

Swedish media released video purporting to show the suspect being led from a restaurant after meeting their contact.

The suspect had been working on “tasks known to be the type of intelligence sought after by foreign powers”, a security service statement said, without giving details.

“It is suspected that the criminal activities have been going on since 2017,” it added.

A witness quoted by Swedish newspaper Aftonbladet said several officers of the Swedish security police, known as Sapo, stormed the restaurant and surrounded a table where two people were sitting having a meal.

Swedish media said a second person was also detained in the operation but later released after claiming diplomatic immunity.