Jihadist attacks killed more than 5,000 people in just one month, an investigation by the BBC and King's College London has found.

Civilians bore the brunt of the violence, with more than 2,000 killed in reported jihadist incidents during November 2014. Islamic State carried out the most attacks, adding to the spiralling death toll in Iraq and Syria.

The data gathered by the BBC found that 5,042 people were killed in 664 jihadist attacks across 14 countries - a daily average of 168 deaths, or seven every hour.

About 80% of the deaths came in just four countries - Iraq, Nigeria, Syria and Afghanistan, according to the study of media and civil society reports.

Iraq was the most dangerous place to be, with 1,770 deaths in 233 attacks, ranging from shootings to suicide bombings.

In Nigeria, 786 people, almost all of them civilians, were killed in 27 Boko Haram incidents.

Afghanistan suffered almost the same number of deaths as Nigeria (782) but they tended to be in smaller, targeted attacks.

In war-ravaged Syria, 693 people were killed; Yemen had 410 deaths in 37 attacks.