The year 2015 was the second deadliest for terrorist attacks on record , with 114 deaths , according to the Global Terrorism Index . The report said 85 % of attacks occurred in Iraq , Afghanistan , Nigeria , Pakistan , and Syria , while ISIS , Boko Haram , the Taliban , and al - Qaeda were behind 74 % of attacks . terrorism was responsible for a 20 % rise in deaths across the Organisation for Economic Co - operation and Development zone . The report also said numbers of terrorist incidents had risen in Denmark , France , Germany , turkey and Turkey , while deaths in Iraq and Nigeria fell by 32 % in 2015 .
The year 2015 was the second deadliest for terrorist attacks on record, with 29,376 deaths, according to the Global Terrorism Index. The report said 72% of attacks occurred in Iraq, Afghanistan, Nigeria, Pakistan, and Syria, while ISIS, Boko Haram, the Taliban, and al-Qaeda were behind 74% of attacks. ISIS was responsible for a 650% rise in deaths across the Organisation for Economic Co-operation and Development zone. The report also revealed numbers of terrorist incidents had risen in Denmark, France, Germany, Sweden and Turkey, while deaths in Iraq and Nigeria fell by 32% in 2015.