Windows broken in east Belfast houses
About 15 people attacked a number of houses in east Belfast in the early hours of Friday morning.
Police said they responded to reports of trouble at about 01.50 GMT on the Lower Newtownards Road. Windows were broken at the houses.
They said there was then a "confrontation" between residents and the attackers.
A 27-year-old man has been charged for possessing an offensive weapon and a man, 20, was arrested for rioting.
The 27-year-old is due to appear in court in 21 January.
PSNI Supt John McCaughan appealed to residents in communities to remain calm.
"Tensions are heightened; however, we would ask that people take a step back and consider the wider implications of engaging in any criminal behaviour," he said.
"Police will have a visible presence on the streets of south and east Belfast over the festive period in order to help keep residents and communities safe."