Detectives investigating allegations of sex abuse dating back a number of years have been granted more time to question four men and two women.
A fifth man, questioned in connection with intimidation, has been released on bail pending further inquiries.
The seven people were arrested in County Down on Friday to answer questions on what police said were allegations of "historic sexual abuse".
On Saturday, police were granted a further 36 hours to question suspects.
The investigation is being carried out by the PSNI's Public Protection Unit.