According to Europol's annual report on terrorism in the European Union, the jihadist attacks in 2017 had three patterns: indiscriminate killings (London attacks in March and June and Barcelona attacks), attacks on Western lifestyle (the Manchester bombing in May 2017, 2017 Istanbul nightclub shooting), and attacks on symbols of authority (Paris attacks in February, June and August). The agency's report also noted that jihadist attacks had caused more deaths and casualties than any other type of terrorist attack, that such attacks had become more frequent, and that there had been a decrease in the sophistication and preparation of the attacks.