The move comes as Norway is on high alert following several reports of mysterious drone sightings close to offshore oil and gas drilling platforms run by major energy producer Norway.

Last month’s Nord Stream gas pipeline blasts in the Baltic Sea are widely assumed to be the result of sabotage.

The man, named as 50-year-old Vitaly Rustanov, was arrested this week at the border post of Storskog, the only transit point between Norway and Russia. A judge at a court in Vadso ordered Rustanov placed in custody for two weeks in line with a police request.

“There are… reasons to believe the accused will try to escape judicial proceedings unless he is placed in provisional custody,” the judge ruled. Rustanov was carrying two Russian passports and an Israeli one when arrested, he noted.

According to the judge’s ruling, Rustanov, had admitted to flying drones “across the whole country” but denied any wrong-doing.

In Norway since August, he was carrying a partially encrypted four-terabyte stash of photos and videos when arrested.

“He has explained he was in Norway as a tourist visiting somebody,” policen official Anja Indbjor told Verdens Gang daily.

“He has explained he photographed and flew a drone for private reasons and indicated he likes taking photos and is a photographer,” added Indbjor.

Norway, along with several other Western countries, has forbidden Russians and Russian entities from overflying its territory following the February invasion of Ukraine. Breaking that ban is punishable by a three-year prison term. Rustanov told police he was unaware of the ban.

With Russia’s invasion of Ukraine having led to a huge fall-off of Moscow’s energy deliveries, Norway has overtaken Russia as the main supplier of natural gas to Western Europe.

Following the Nord Stream explosions and drone sightings, Norway increased security around its energy installations.

Norwegian media reported that another drone had been seen late Thursday overflying a gas treatment facility at Karsto in the southwest of the country.

Police urged the public to pass on any information as they sought further clues as to who was responsible.