Officials at Singapore’s Changi prison say its notoriously harsh conditions are aimed at deterring prisoners from reoffending and help them re-integrate into society after serving their sentence.

Adam Liaw goes inside Changi Prison. With rare access to the maximum-security wing reserved for those convicted of the most serious offences, Dateline investigates Singapore's tough stance on crime.

SINGAPORE - There has been a spike in the number of young people locked up in Changi Prison for their involvement in secret society activities, under a law that allows detention without trial.