US Secretary of State John Kerry has repeatedly called leaders in Saudi Arabia and Iran to try to defuse their diplomatic row, US officials say.

A prestigious award for graphic novelists in France, the Grand Prix d'Angouleme, is facing calls for a boycott after its list of nominees failed to include any women.

Man accused of buying the guns used in the San Bernardino attacks pleads not guilty to the five charges he faces.

Surrogate parents should be treated like sex offenders and sent to prison, according to Italian Interior Minister Angelino Alfano.

Hundreds of women protest in the German city of Cologne over sexual assaults and thefts carried out by groups of men on New Year's Eve.

Authorities investigating the San Bernardino shooting, which killed 12 people, appeal for public help in tracking the attackers' movements.

The North Korean authorities say they have successfully tested a hydrogen bomb amid reports of a tremor near the main nuclear test site.

Leading US Republicans denounce President Barack Obama's move to tighten gun controls in the wake of mass shootings.