A torpedo of a submarine that belongs to North Korea had sunk a navy ship of South Korea in March. Now it has been proved with proper evidence. In this incident 46 sailors were missing. But the mystery behind the attack has been unraveled now.

The investigators have found a part of the torpedo on the sea floor. The lettering on that torpedo is just matching with a North Korean design.

North Korea has earlier denied any of its involvement in that torpedo attack in March. So Lee Myung-bak has promised to take stern action against the North Korea. The officials at the President's office have said they had told the Australian Prime Minister to take firm and responsive action against North Korea and they have also urged International Community to look in to this matter.

South Korea has decided to give international pressure to North Korea to accept the exact truth. The experts from US, Britain, Sweden and Australia were the leader of this investigation team and they have said that all the evidence was indicating that the torpedo was fired by a North Korean submarine.