Prosecutors in Gliwice, southern Poland, said the investigation was launched on Wednesday on suspicion of inciting sabotage on behalf of a foreign intelligence service in return for payment.
The alleged target was Flytronic, a defence manufacturer based in the city.
The case has been referred to the Katowice branch of Poland’s Internal Security Agency (ABW), prosecution spokeswoman Agnieszka Bukowska said.
The investigation follows a report by a journalist working for Vot Tak, a Russian-language news outlet owned by Polish public broadcaster TVP.
The reporter was approached on Telegram by a user calling himself "Joker."
The alleged recruiter initially offered USD 1,000 for each car with Ukrainian number plates that was set on fire.
The journalist, posing as a Belarusian whose visa had not been renewed and who was facing deportation, rejected the offer.
"Joker" then proposed setting fire to a factory in Poland, naming Flytronic as the target.
He sent a video apparently filmed by someone walking around the site and suggested using Molotov cocktails.
In return for carrying out the attack and filming it, he offered between USD 20,000 and USD 30,000, as well as an honour from the Belarusian authorities.
Vot Tak found that the Telegram account was registered to a Russian phone number linked to the Saratov region.
The outlet also reported that "Joker" was seeking recruits in several countries, including the UK and France.
Flytronic is part of WB Electronics, a privately owned defence group.
It manufactures FlyEye drones, which Ukrainian forces use to adjust artillery, missile and drone strikes, as well as Warmate loitering munitions.
(ał)
Source: polskieradio24.pl, tvp.info