German police have detained four people in connection with a September fire at a Starlink ground station in Poland, as Warsaw accused Russian intelligence of directing the attack.

The Sept. 23 blaze struck the facility in Wola Krobowska, south of Warsaw, damaging its power system and backup generator. Polish officials said the suspected sabotage was intended to disrupt internet services, including those supporting Ukraine’s military.

Polish Prime Minister Donald Tusk announced Monday that German authorities had detained two Turkish nationals at Poland’s request. German officials confirmed that special forces arrested two men near the railway station in Nürtingen, in the southwestern state of Baden-Württemberg.

RMF FM subsequently reported two additional detentions, citing unnamed sources. Authorities had not publicly confirmed all four arrests in the reporting available Tuesday. Details of the additional suspects’ alleged roles remained unclear.

Tomasz Siemoniak, Poland’s minister overseeing the intelligence services, said Russian intelligence was behind the suspected sabotage. He said Russian services were increasingly recruiting people with links to the criminal underworld to conduct such operations.

Polish police chief Marek Boron said investigators had gathered fingerprints, DNA evidence and information tracing the suspects’ movements before and after the fire. Poland is seeking the transfer of the two Turkish suspects to face proceedings there.

The station helps route internet traffic through Poland and into Ukraine. Starlink has become an important communications tool for Ukrainian forces since Russia’s full-scale invasion, making infrastructure supporting the network a security concern beyond Ukraine’s borders.