1. North Korea is believed to have been working on nuclear weapons only since the 1990s.

2. The same group is believed to have targeted Sony Pictures in 2014.

3. Hackers were not believed to be at fault, at least from early reports on July 21.

4. Shekau is believed to be in his late 30s.

5. The fire, believed to be caused by an electrical fault, also injured 2.

6. Most of those killed were believed to be between the ages of 12 and 16.

7. In the 19th century there were believed to be up to 14,000.

8. Some 400 people are believed to have drowned in another capsizing on April 13.

9. The effort is believed to be the first of its kind in the country.

10. The account believed to have been used for the research would be terminated.

11. There are people there that wanted to be there and believed in it.

12. He believed it was his legal right to take the camera.

13. Police are searching for another three men believed to have been involved in the kidnapping.

14. The man on the left has not been identified and is believed to have died.

15. He believed it would create more jobs that would pay better and be more fulfilling.