Islamic State (ISIS) has attracted major media attention for its brutal beheading videos, and recently for its major attacks against a Russian airliner and Paris that left hundreds dead - but a report released Wednesday shows that it isn't the deadliest terror group in the world.

That dubious distinction goes to Boko Haram in Nigeria, an Islamic terrorist organization that pledged allegiance to ISIS in March and is also known as Islamic State's West Africa Province (ISWAP).

The report, published in the Global Terrorism Index and produced by the Institute for Economics and Peace, shows that in 2014 Boko Haram murdered a whopping 6,644 victims, whereas ISIS murdered 6,073 people.

Coming in a far third was the Taliban at 3,477 victims.

The report comes as a bomb attack left 32 people murdered and around 80 wounded on Wednesday in the Nigerian city of Yola. The bombing on a fruit and vegetable market was conducted by Boko Haram according to security estimations.

Most of Boko Haram's attacks take place in North Africa, and largely due to the lethal group Nigeria last year saw a 300% rise in terrorism fatalities, leaping to 7,512 total terror deaths. The report noted this is the largest increase in terror deaths ever recorded in any country.

While Boko Haram has focused on Nigeria, in 2014 it doubled its attacks in Chad and Cameroon, launching 46 attacks and murdering 520 in those countries.

The report was drawn on data gathered by the Global Terrorism Database (GTD), and collated by the National Consortium for the Study of Terrorism and Response to Terrorism.