Duo is Google's response to Apple's FaceTime, Microsoft's Skype and Facebook's Messenger.

Berlin officials say they no longer want the private firm PeWoBe to run migrant hostels in the city, after emails denigrating migrants were leaked.

A dig is under way for a so-called "Nazi gold train" rumoured to be hidden near Walbrzych in south-western Poland.

The US sends 15 Guantanamo detainees to the United Arab Emirates, in the largest single transfer during President Obama's administration.

Armed men in Mexico abduct at least 10 people who were dining in a restaurant in the seaside resort of Puerto Vallarta.

A Swedish top-flight match is abandoned after Ostersunds goalkeeper Aly Keita is attacked by a pitch invader.

A Brazilian judge orders the arrest of four sports hospitality executives over allegations of illegal reselling of tickets for Rio 2016.

Police in New York charge a man with murder in connection with the killing of an imam and his aide at the weekend.