Bricks and masonry have been thrown at police dealing with race-related hate crimes in Belfast on Thursday night.
A car was set on fire and the windows of a number of houses were smashed in south Belfast.
In east Belfast, bins were set on fire on Castlereagh Street.
Meanwhile, a group of masked men attacked police on Flora Street, but no officers were injured.
Assistant Chief Constable Melanie Jones said those who are taking part in the riots “need to think of the consequences of their actions”.
It follows several nights of disorder in Belfast, including racially motivated attacks.
A number of businesses were targeted after an anti-immigration protest at Belfast City Hall on Saturday.
There were further incidents on Monday, Tuesday and Wednesday evenings.
Twenty-two people have been arrested – 15 of them have been charged and are in custody following violent disorder in recent days.