Section B Arab cooperation for the prevention and suppression of terrorist offences Article 4 Contracting States shall cooperate for the prevention and suppression of terrorist offences, in accordance with the domestic laws and regulations of each State, as set forth hereunder: I. Exchanging of information 1. Contracting States shall undertake to promote the exchange of information between and among them concerning: a. The activities and crimes of terrorist groups and of their leaders and members; their headquarters and training; the means and sources by which they are funded and armed; the types of weapons, munitions and explosives used by them; and other means of aggression, murder and destruction; b. The means of communication and propaganda used by terrorist groups, their modus operandi; the movements of their leaders and members; and the travel documents that they use. 2. Each Contracting State shall undertake to notify any other Contracting State in an expeditious manner of the information it has concerning any terrorist offence that takes place in its territory and is intended to harm the interests of that State or of its nationals and to include in such notification statements concerning the circumstances surrounding the offence, those who committed it, its victims, the losses occasioned by it and the devices and methods used in its perpetration, to the extent compatible with the requirements of the investigation and inquiry. Contracting States shall undertake to cooperate with each other in 3. the exchange of information for the suppression of terrorist offences and promptly to notify other Contracting States of all the information or data in their possession that may prevent the occurrence of terrorist offences in their territory, against their nationals or residents or against their interests. 4. Each Contracting State shall undertake to furnish any other Contracting State with any information or data in its possession that may: a. Assist in the arrest of a person or persons accused of committing a terrorist offence against the interests of that State or of being implicated in such an offence whether by aiding and abetting, collusion or incitement; b. Lead to the seizure of any weapons, munitions or explosives or any devices or funds used or intended for use to commit a terrorist offence. 5. Contracting States shall undertake to maintain the confidentiality of the information that they exchange among themselves and not to furnish it to any State that is not a Contracting State or any other party without the prior consent of the State that was the source of the information.