Europol predict an increasing threat to the UK from left wing and anarchist terrorism. In their most recent analysis of terrorist threats throughout Europe, analysing attacks and terrorist activity in 2010, red terrorists were responsible for some 45 attacks resulting in six fatalities, including a Greek police officer. The same report shows zero activity for right wing terrorists in Europe during the same period. Although attacks have previously occurred in central and southern Europe, the report warns that attacks may be co-ordinated throughout Europe; "Social unrest among the population, caused by the global economic downturn and the reduction of state spending on social welfare, may have influenced this development, which has been noticeable since 2007. The modus operandi in a number of attacks showed signs of increased internationalisation of left-wing and anarchist groups – although both have historically been international in outlook."