The police said they are treating attacks on buildings in a County Londonderry village as sectarian.
Windows of the hotel were broken
Windows were smashed in a hotel, houses and a car during the trouble at Main Street in Garvagh early on Saturday.
There are no reports of any injuries. Two men were arrested. One has since been released on police bail.
The owner of the Imperial Hotel said that five or six "thugs" standing about had attacked wedding guests and that his life had been threatened.
"It's just unbelievable what they done," he said.
"I'm getting great support from both sides of the community but just to think that there's a small number of thugs that will do this to businesses.
"It's not just my business there have been others over the years, by the same element but they seem to be able to get away scot free."
SDLP assembly member John Dallat said that the families in the attacked houses had been traumatised.
He hoped the police would increase their cover in the town at night, but praised them for their quick action.
"I hope this is not the beginning of a new season of attacks on innocent people," he said.
Sinn Fein councillor Billy Leonard said an asthmatic girl was living in one of the houses which were attacked.
"Purely and simply because they are easy targets, people can come along, damage their car, break their windows, so obviously they are very distressed," Mr Leonard said.
"Can you image that person, who had a serious asthmatic attack in recent months, being wakened up to the sound of breaking glass and shouting thugs?"
Meanwhile, in Londonderry 25 people were involved in clashes on the Glendermott Road at about 0215 BST. One man was arrested.
The crowd involved in both incidents dispersed when the police arrived.
Police in Derry would like witnesses to contact them.