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.
Hong Kong police began dismantling the city's main pro-democracy site and hauling off a hard core of protesters who nevertheless vow that their struggle lives on.
A white police officer shot dead a black man in Arizona when he mistook some pills for a gun amid protests in New York triggered by a string of similar incidents.