On first anniversary of MH370's disappearance, Malaysian authorities release detailed report but it sheds little light on the mystery.

The first comprehensive report into the mystery of Malaysia Airlines flight 370 has revealed the battery of an underwater locator beacon had expired more than a year before the plane vanished in March 2014.

Apart from that anomaly, the detailed report released on Sunday – exactly one year since the plane went missing – devotes pages and pages to describing the complete normality of the flight, shedding little light on the mystery.