A 26-year-old woman and a man aged 36 were arrested in Pates Lane in Coleraine for disorderly behaviour last night.
They were detained as a parade was taking place in the area.
The pair are currently in custody assisting police with their enquiries.
Then later, shortly after 11.40pm, it was reported that a number of males were involved in an assault in the Winston Way area.
Two 17 year old boys and two men aged 18 and 19 were detained in connection with the incident and are also in police custody.