A large number of various types of terrorist organisations have an active presence in the EU. Some of them aim at Member States or Third State targets situated in Member States, whereas some others who conduct their campaigns mainly outside the EU, use the EU as their logistical base or for fundraising. Altogether 498 attacks were carried out in the EU in 2006.The vast majority of them resulted in limited material damage and were not intended to kill., However, the failed attack in Germany and the foiled London plot demonstrate that Islamist terrorists also aim at mass casualties. A total of 706 individuals suspected of terrorism offences were arrested in 15 Member States in 2006. Investigations into Islamist terrorism are clearly a priority for Member States’ law enforcement as demonstrated by the number of arrested suspects reported by Member States., The small number of suspects arrested for dissemination of propaganda may indicate the lack of legal basis and difficulty in investigating these types of crimes. France, Spain and the UK are the countries most severely affected by terrorism as concluded from the number of terrorist attacks and arrested suspects as well as the average penalties handed out by the courts.