Poland's National Public Prosecutor's Office announced on Monday the launch of an investigation to determine "participation in the activities of foreign intelligence agencies against the Republic of Poland and terrorist crimes," specifically "deliberately using devices containing flammable materials to set fire to the WB Electronics factory." The factory, located south of Warsaw, produces critical drone components for the Polish and Ukrainian armies. No further details were provided, but Russia is widely suspected of carrying out sabotage activities across Europe against facilities supplying Ukraine.