South Korea has officially blamed North Korea for the explosion on board one of its naval ships which caused it to sink last March, killing 46 sailors.
A detailed investigation cites overwhelming evidence that a North Korean submarine fired a torpedo at the ‘Cheonan.’
For its part, Pyongyang has denied any involvement.
But, at a press conference in Seoul, military and civilian investigators presented a selection of items recovered from the scene of the sunken vessel.
They included the remains of the torpedo with North Korean writing on it.
South Korea is now expected to push for the case to be referred to the United Nations. Its options are limited if it is to avoid escalating already heightened tensions with its northern neighbour.
While the United States has backed its ally, North Korea has threatened to take strong measures, including war, if the South insists on further UN sanctions.