Did the service know about the attack? Even a pro-government writer confirms that. Why didn't they respond sooner?

Did the authorities play the safety of Poles again? Radio writer Zet Mariusz Gierszewski, who is hard to fishy of deficiency of sympathy for the government, has reported for respective days that the Railway safety Service officials have reported suspicious people "rolling" at the tracks. Why have at least 3 acts of sabotage been conducted despite this information? Where was Homeland Security?