The number of deaths from terrorism increased by 61% between 2012 and 2013, a study into international terrorism says.
There were nearly 10,000 terrorist attacks in 2013, a 44% increase from the previous year, the Global Terrorism Index 2014 report added.
The report said militant groups Islamic State, al-Qaeda, Boko Haram and the Taliban were behind most of the deaths.
Iraq was the country most affected by terrorism, the report said.