The Citizen's Council for Public Security and Criminal Justice released a report that reveals the world's 50 most dangerous cities. 

The ranking was calculated using the average number of homicides per 100,000 residents. 

The 50 of the world's most dangerous cities include:

1. Tijuana, Mexico - 138 
2. Acapulco, Mexico - 110.50
3. Caracas, Venezuela - 99.98
4. Victoria, Mexico - 86.01
5. Juarez, Mexico - 85.56
6. Irapuato, Mexico - 81.44 
7. Guayana, Venezuela - 78.30
8. Natal, Brazil - 74.67 
9. Fortaleza, Brazil - 69.15 
10. Ciudad Bolivar, Venezuela - 69.09
11. Cape Town, South Africa - 66.36
12. Belem, Brazil - 65.31
13. Cancun, Mexico - 64.47
14. Feira de Santana, Brazil - 63.29
15. St. Louis - United States - 60.59
16. Culiacan, Mexico - 60.52
17. Barquisimeto, Venezuela - 56.67
18. Uruapan, Mexico - 54.52
19. Kingston, Jamaica - 54.12
20. Obregon, Mexico - 52.09
21. Maceio, Brazil - 51.46
22. Vitoria da Conquista, Brazil - 50.75
23. Baltimore, United States - 50.52
24. San Salvador, El Salvador - 50.32
25. Aracaju, Brazil - 48.77
26. Coatzacoalcos, Mexico - 48.35
27. Palmira, Colombia - 47.97
28. Maturin, Venezuela - 47.24
29. Salvador, Brazil - 47.23
30. Macapa, Brazil - 47.20
31. Cali, Colombia - 47.03
32. Celeva, Mexico - 46.99
33. San Pedro Sula, Honduras - 46.67
34. Ensenada, Mexico - 46.60
35. Campos dos Goytacazes, Brasil - 46.28
36. Tepic, Mexico - 44.89
37. Manaus, Brasil - 44.00
38. Guatemala, Guatemala - 43.73
39. Recife, Brazil - 43.72
40. Distrito Central - 43.30
41. San Juan, Puerto Rico - 42.40
42. Valencia, Venezuela - 42.36
43. Reynosa, Mexico - 41.48
44. Joao Pessoa, Brazil - 41.36
45. Nelson Mandela Bay - South Africa - 39.16
46. Detroit, United States - 38.78
47. Durban, South Africa - 38.51
48. Terisina, Brazil - 37.61
49. Chihuahua, Mexico - 37.50
50. New Orleans, United States - 36.87

The list obtained from the Seguridad Justicia y Paz website. In the methodology, the report mentions that the major difficulty when obtaining data for the ranking was the lack of transparency from many countries in the list. It also states that Mexico has replaced Brazil by having the most dangerous cities in the world now, despite the fact that Brazil has 67% more citizens than Mexico. 

The report discusses cities that are included in the ranking for the first time and cities that have moved out of the list, as well.