It's in Polish so I ran it through translate and I don't know enough polish to do my own research on other sites nor if this site or translation is accurate. But here's the English translation:
POLES PLANNED AN ASSASSINATION ATTEMPT ON MUSLIMS! ABW HAS TAKEN ACTION. EXPLOSIVES, WEAPONS, AMMUNITION AND CHEMICALS WERE FOUND
13 November 2019 10:47
The details of the Sunday action of the Internal Security Agency and pyrotechnicians on Paganini Street in Italy are already known. Two people were detained in connection with the preparation of attacks using explosives.
The detained persons were to conduct a series of attacks using weapons and explosives against persons of Islamic religion in Poland.
The men were to be modeled on the attacks carried out by Anders Breivik and Brenton Tarrant.
A large number of explosives, weapons and ammunition were secured in several places in the country.
Vials with a highly toxic chemical were also found.
The two detainees were former accomplices of Bruno Kwietień, who was to carry out an assassination attempt on the Sejm.