The US National Secutiry Agency (NSA) has knew about the Heartbleed bug for at least two years before it was revealed, according to Bloomberg.
One person 'familiar with the matter' told the news agency that the NSA preferred to keep the bug secret in order to harvest the private data the flaw exposed.
More top news
Experts have called for the "potentially dangerous" practice of sending mentally ill people long distances for treatment to end.
Investigation underway into whether a man was killed by a meteorite, which if confirmed would be the first recorded death-by-space rock.
Government to press ahead with plans to allow local councils to extend trading hours on Sundays.