The leaders of Germany, France, Russia and Ukraine have agreed a deal to end fighting in eastern Ukraine, participants at the summit talks said on Thursday.
Chinese President Xi Jinping will make his first state visit to the United States in September, China said on Wednesday, after both countries' leaders laid out possible areas of friction in a telephone call.
Newsweek magazine's Twitter account was the victim of hackers on Tuesday who posted a threat to U.S. President Barack Obama and his family and the words "CyberCaliphate" and "Je suis IS," a reference to Islamic State and the French magazine Charlie Hebdo.