Tech giant Yahoo! says it has been hacked by a "state-sponsored actor"

Names, email addresses, and some security information was stolen from more than half a billion Yahoo! accounts in 2014, in what is the biggest known data breach to date

The chief executive of US bank Wells Fargo has stepped down from an advisory position at the Federal Reserve

John Stumpf's resignation comes amid a scandal over some two million fee-generating accounts that were opened at the bank without customers' knowledge

The US Department of Labor is investigating how the bank treated its staff

And diplomatic efforts to stop the fighting in Syria are at an impasse

The Syrian military announced a new offensive in the city of Aleppo, even as ceasefire talks are continuing in New York

Syrian warplanes pounded rebel-held areas of the city on Friday, where about 250,000 people are trapped

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