Flags will fly at half-mast across Russia as the country remembers the sailors who lost their lives in one of the greatest tragedies in Russian naval history.

Exactly 10 years ago, an explosion on the nuclear-powered Kursk submarine, the largest attack submarine ever built, resulted in the deaths of all 118 people on board.

In Moscow, a ceremony is being organised at the Central Army Museum, and across the country further ceremonies will be held at all fleets of Russia's Navy.

Richard Galpin reports from Moscow.