Pakistan and Nigeria are among the top countries in the world where Christians face the most violent persecution, according to a recently released list by a global watchdog group.

The World Watch List released by the nonprofit Open Doors tracks Christian persecution by a variety of metrics, including social and governmental pressures. North Korea and Afghanistan top the list for countries where Christians face the most overall persecution, although not necessarily violent.

When measuring violent attacks against Christians, however, the top unsafe environments shift dramatically in favor of Africa, with four of the top five most violently anti-Christian countries located on the continent. Pakistan, in the Middle East, ranks the highest in the world for violent persecution against Christians.

Of the countries that see the most Christian martyrs, four out of the top five are also in Africa. Nigeria alone saw 1,350 Christians martyred last year.