The extremists have stepped up attacks in Nigeria and neighboring countries including Niger, Cameroon and Chad since Nigeria's President Muhammadu Buhari took office in May pledging to halt the 6-year-old uprising that Amnesty International says has killed

Here is an Associated Press article on the upcoming Croatia-Cameroon match.

Somebody in Germany, or in France, can't understand how things happen in Cameroon," Volke said. "It works for people in Cameroon. Just respect the way things happen in Africa. We found a solution."

The elephant populations worst hit by poaching are in Tanzania, Gabon, Cameroon, Central African Republic, Mozambique, Republic of Congo and Congo.

Check out an Associated Press article on Brazil and Cameroon.

Mario Mandzukic, who returned from suspension and scored twice against Cameroon, is again starting up front with Ivica Olic, who also scored against Cameroon.

During its seven-year uprising, Boko Haram extremists have killed more than 20,000 people and displaced more than 2.6 million in Nigeria and neighboring Cameroon, Niger and Chad.

The multinational force includes soldiers from Nigeria and its neighbors to the north and northeast: Cameroon, Chad and Niger.

It has used dozens of girls and women in recent suicide bombings in Nigeria and neighboring Chad, Cameroon and Niger, raising fears it is using kidnap victims.

Chile and the Group A match between Croatia and Cameroon.

Chile and the Group A match between Croatia and Cameroon.

Chile and the Group A match between Croatia and Cameroon.

The Spiegel article cited Wilson Raj, a convicted match-fixer, as saying the Cameroon 0-4 loss to Croatia was rigged. Raj told a journalist with the publication that Cameroon would lose 4-0 hours before the team played Croatia and they did.

Four detained Boko Haram leaders were released Wednesday night in Banki, a town on the northeast border with Cameroon, said a military officer familiar with the talks who spoke on condition of anonymity because he is not authorized to speak to the press

Chile and the Group A match between Croatia and Cameroon.

Chile and the Group A match between Croatia and Cameroon.

Chile and the Group A match between Croatia and Cameroon.

Chile and the Group A match between Croatia and Cameroon.

Chile and the Group A match between Croatia and Cameroon.

Chile and the Group A match between Croatia and Cameroon.

Chile and the Group A match between Croatia and Cameroon.

Chile and the Group A match between Croatia and Cameroon.

We have seen a few operations across the border into Cameroon and the extreme north of Cameroon. Boko Haram is still a threat to expand its operations outside of northeastern Nigeria to other regions of Nigeria.

Cameroon was terrible in the first round of matches, African champion Nigeria couldn't even beat Iran and Ghana lost to the United States.

Additional U.S. troops and assets are also in Jordan, Djibouti, Turkey, Egypt and Cameroon to support counterterrorism missions, while other overseas operations remain classified.

I'm from Cameroon, Central Africa. I went to medical school in Nigeria, West Africa, I did general medicine. And, in most countries, we are not hyper-specialized.

Mexico also started with a victory, beating Cameroon 1-0, and will similarly be looking to advance from Group A.

Mexico also started with a victory, beating Cameroon 1-0, and will similarly be looking to advance from Group A.

Cameroon has won just one of its 13 World Cup games since reaching the quarterfinals in 1990.  

By contrast, competition in Group A is live, with only Cameroon already out of contention. Host nation Brazil only needs a draw against Cameroon to be sure of advancing, while Croatia and Mexico meet for a winner-takes-all match.