We wish to clarify any confusion over the sinking of the South Korean navy's ship Cheonan on 26 March this year (for example, see Nature 466, 302–303, 2010 and Nature 466, 815, 2010).

The report of the multinational Joint Investigation Group has now been released in Korean and English (see http://www.cheonan46.go.kr/100) and should counter scientific criticisms of the investigation's conclusion that the Cheonan was sunk by a torpedo fired from a North Korean midget submarine.