A petrol bomb was thrown at a mosque in Co Down in the early hours of Saturday morning, in an incident described by police as racially motivated.
The mosque in Newtownards was attacked at around 1am, with graffiti sprayed on the front door and walls of the building on Greenwell Street.
Police said the petrol bomb thrown at the property did not ignite.
Chief Inspector Hutchinson said: “This is being treated as a racially motivated hate crime, and I want to send a strong message to those who carried this out, that this type of activity will not be tolerated and any reports of hate crime are taken very seriously.
“I am appealing to anyone with any information or footage that could assist with enquiries to come forward and help to identify those responsible and put them before the courts.”
Cars were set alight in Tavanagh Street and Sandhurst Gardens in Belfast and police said both incidents are being treated as racially motivated hate crimes.
The rear door of a restaurant on Ormeau Road was also kicked with racial slurs shouted at the workers inside.
Five people were arrested on Friday.
A 22-year-old man was arrested following Friday’s protests in Belfast accused of throwing a bottle at a police vehicle.
He will appear in court on September 6 charged with offences including disorderly behaviour and criminal damage.
A 51-year-old man also arrested following the city centre protest activity has also been charged with disorderly behaviour and will appeared in court on Saturday.
The arrests came after a number of petrol bombs were found by police in the vicinity of Spencer Road.
One teenager was charged with possession of petrol bomb in suspicious circumstances, while the other teenager was charged with possessing articles for use with petrol bombs.
Both appeared before a special sitting of Dungannon Magistrates’ Court on Saturday.
A 37-year-old man who was arrested in Portrush on suspicion of intentionally encouraging riot in relation to online activity remains in police custody.
Police have also arrested a 48-year-old man in the Belfast area.
The man, who was arrested on suspicion of intentionally encouraging riot, remains in police custody.
Separately, Police in south Belfast, investigating disorder in the vicinity of Broadway Roundabout, on July 15 and 16, arrested a 14-year-old boy on suspicion of riot and possession of an offensive weapon. He is currently in custody assisting officers with their enquiries.
Temporary Assistant Chief Constable Melanie Jones said: “We continue to investigate all reports made to us in relation to the recent disorder on our streets and we will be making further arrests.
“The outpouring of support from our communities for their neighbours who have chosen to make Northern Ireland their home has been heartening, and more accurately reflects the views of most of the citizens of Northern Ireland.
“We will continue to have a significant visible policing operation in place across Northern Ireland over the weekend to ensure our communities are kept safe.”
It comes as thousands of people took to the streets of Belfast on Saturday in an anti-racism demonstration.
