Two men are due to appear in court on Tuesday charged with separate child sex offences, including rape and making indecent images.
An 18-year-old man has been charged in connection with an incident in north Belfast just days ago, police said.
He is accused of rape, sexual activity with a child and making indecent images of children.
The charges were brought by officers from the PSNI's Child Abuse Investigation Unit, following an incident which took place between 1-3 March.
The accused is due to appear before Laganside Magistrates Court in the morning.
Meanwhile, a 31-year-old man is also due in court on Tuesday in relation to incidents in south Belfast in October and November 2009.
He faces a number of charges, including making and possessing indecent images of children, grooming a child under the age of 16 and sexual activity with a child under 16.
© UTV News