German security authorities discovered handguns stashed in a forest near Berlin last ​year and believe the weapons were to ‌be used to carry out assassinations on behalf of Russian intelligence, Sueddeutsche Zeitung reported on Friday.

The newspaper’s report, ⁠published jointly with broadcasters NDR and WDR ​on Friday, cited unspecified sources as saying that ​one suspect had been arrested in Romania and may have been responsible for setting up the weapons ​storage.

The Federal Public Prosecutor’s Office is investigating ​the case on suspicion of planning of a serious ‌act ⁠of violence posing a threat to the state, the report said.

The paper said that Germany’s domestic intelligence service, which has been warning ​of a ​heightened risk of ⁠Russian sabotage or assassination attempts, is convinced that those setting up ​the cache were acting on orders ​from ⁠Russian services.

Potential targets include defence industry executives, exiled opposition figures and supporters of Ukraine, the ⁠report ​said.

The Federal Public Prosecutor ​and Germany’s domestic intelligence service declined to comment.