A German town mourned 16 teenagers who were among the 150 people killed in a plane crash in the French Alps as they returned from a school exchange in Spain.
The Mexican government bristled at a UN committee's findings that disappearances are widespread in the country and the authorities lack precise numbers of missing people.
Authorities in Mexico can now say with "legal certainty" that the 43 students who went missing in September were murdered by hitmen working for a drug gang.
Family members of 43 missing Mexican students said Sunday they would continue pressing for answers over the fate of their sons throughout the holidays.
Dozens of protesting students vandalized an SUV carrying the mayor of the Mexican coastal city of Acapulco, demanding justice over the presumed murder of 43 classmates
A young man who disrupted the Nobel prize ceremony in Oslo by waving a Mexican flag streaked with red said he did it to denounce the alleged killing of students by Mexican authorities.