Nineteen people – including a 16-year-old-boy – have now been arrested following the violence in parts of Northern Ireland this week.
Thursday night was relatively quiet although police say an arson attack in north Belfast is linked to the disorder.
The fire service was called to the Shore Road on Thursday night where a blaze had been set at the rear of a house – there are no reports of injuries.
A leading member of the Indian community in Londonderry has said some health care professionals from overseas have told him they are now questioning whether they should have come to Northern Ireland at all.
In an update on the disorder, police said the property was unoccupied at the time and two neighbouring properties also sustained damage as a result of the attack, which is being treated a hate-motivated arson.
They also said they were alerted to race-hate graffiti in Dee Street and Newtownards Road areas of east Belfast.
Elsewhere, a car fire was extinguished on the Glenshane Road in Derry at 00:30 BST on Friday. No one was injured in the incident and police are treating it as a hate-motivated arson.
The Police Service of Northern Ireland (PSNI) say its policing operation will remain over the weekend to ensure public order is maintained.
The Northern Ireland Fire and Rescue Service (NIFRS) said they received 46 emergency calls resulting in crews being mobilised to 26 incidents across Northern Ireland on Thursday evening.