(Reuters) - Yahoo Inc said on Thursday that at least 500 million of its accounts were hacked in 2014 by what it believed was a state-sponsored actor, a theft that appeared to be the world's biggest known cyber breach by far.

LONDON (Reuters) - JPMorgan retained its place at the top of the global investment bank rankings in the first half of this year despite a fall in revenues, while Deutsche Bank's troubles ensured the top five were all U.S. banks, new data on Friday showed.

FRANKFURT (Reuters) - Samsung Electronics aims to re-launch its flagship Note7 smartphone across Europe well before year-end, but it could well be 2017 before the company fully rebounds from a global product recall tied to defective batteries, a regional executive said on Thursday.

UNITED NATIONS (Reuters) - Iranian President Hassan Rouhani on Thursday called on regional rival Saudi Arabia to "cease and desist" from "divisive policies" if it was serious about regional peace and security.

Sept 22 (The Sports Xchange) - The Milwaukee Bucks are reeling after receiving word that their leading scorer Khris Middleton will miss approximately six months due to a hamstring injury.

NEW YORK (Reuters) - On Oct. 5, the U.S. Supreme Court will hear oral arguments on a question that has created considerable confusion in lower courts: When the government claims a corporate outsider has profited from trading illegally on inside information, what must it prove about the motive of the insider who supplied the tip?

TORONTO (Reuters) - Russia claimed a do-or-die 3-0 victory over Finland on Thursday to advance to the semi-finals of the World Cup of Hockey and set up a mouth-watering showdown with arch-rivals Canada.

(Reuters) - Gaming and gambling are among potential growth areas for Formula One as the sport's new owners seek to develop largely untapped digital markets, Liberty Media chief executive Greg Maffei said on Thursday.

(Reuters) - A severely disabled Wisconsin girl who made headlines with her controversial decision to end the medical assistance and treatment that was keeping her alive died on Thursday at the age of 14, the county medical examiner said.