In The Name of Allaah, The Most Merciful, The Bestower of Mercy

Shaikh Abdur-Razzaaq Al-Badr (may Allaah preserve him) says:

Abdur Rahmaan Bin Muljim and those with him started their plots to assasinate Ali, Mu’aawiyah and Amr Bin Aas (radiyallaahu-anhum) on the 17^th of Ramadhaan. Subhaanallaah! This is a continued Sunnah [way or path] of the khawaarij. Many of those who look into history see that many of the (evil) deeds and plots of the Khawaarij are carried out in Ramadhaan. That is because in Ramadhaan the souls of the people are upon tranquillity and drawn towards obedience to Allaah, and the people do not think that anyone will attack them. [Paraphrased] Listen to audio below

Reporting Terrorists to the authorities

http://www.answering-extremism.com/trans-pub/ae_saf_12.pdf