A South Korean man on death row for murdering 13 people in one of the country's worst killing sprees has died after hanging himself.
The Justice Ministry says Jeong Nam-kyu died in a hospital Sunday a day after hanging himself with plastic trash bags in his cell.
The ministry says in a statement Jeong, 40, is believed to have died of a heart attack or brain damage caused by his suicide attempt.
A court sentenced Jeong to death in 2007 for killing 13 people and wounding 20 others. He also robbed and sexually assaulted many of his victims.
Jeong left a note saying he was worried about his execution.