Prosecutor involvement in investigating serious youth crimes will increase from April in an effort to better serve victims and cope with tougher laws against offenders, government officials said Saturday.

The Justice Ministry and the Supreme Public Prosecutor's Office said they are planning to let prosecutors directly investigate cases involving juveniles instead of merely examining papers sent to them by police.

Prosecutors will question suspects, their parents, victims and other concerned people in connection with crimes such as murder, robbery, rape, illegal confinement and inflicting injuries resulting in death, the officials said.