American activist Michael Mohammed seeks contacts with the Kazakh government in order to "bring to justice" the police officer who killed a Kazakhstani citizen four years ago and a black man last month.
National Guard troops patrolled the tense streets of Baltimore in large numbers in anticipation of a fresh large-scale protest over the death of a young African-American man in police custody.
In a special hostage rescue operation, Latvian police has freed a Kazakhstani family of four, who were kept hostage for their expensive property in Almaty, Kazakhstan.
New York Mayor and police commissioner Bill Bratton criticized dozens of officers for turning their backs on the mayor at the funeral of a murdered policeman.
Thousands of police gathered in New York to bid farewell to a murdered officer where a small number used the funeral to protest against mayor Bill de Blasio once again.
Tens of thousands of officers paid tribute to one of their own at a New York funeral, as emotions ran high over recent protests against police violence.
Hong Kong police said they had arrested a dozen pro-democracy protesters after a night of clashes in the first sizeable rally since the last protest camp was cleared last week.
French Prime Minister called for "vigilance" after the country was hit by three bizarre attacks in quick succession, sparking fears of possible copycat action.
New York reeled after the murder of two uniformed cops by a man whom investigators say told bystanders to "watch what I'm going to do" just before the killings.
US President Barack Obama on Sunday "unconditionally" condemned the killing of two uniformed New York police officers who were gunned down in their patrol car in Brooklyn by a lone gunman.