A total of 15 people were arrested in Belfast for offences linked to St Patrick's Day celebrations.
Police said the arrests, in the city centre and Holylands area, were for a range of offences including disorderly behaviour, resisting arrest and assaults on police, and mostly involved people aged in their late teens and mid-20s.
There was a heavy police presence in the Holylands, close to Queen's University, throughout Thursday and Friday, although there was no repeat of the disorder which had marred St Patrick's Day in previous years.
Last year bottles were thrown at police as a crowd of about 300 people gathered, with one officer injured.
Superintendent Melanie Jones said: "Thankfully there was no repeat of the disgraceful levels of behaviour that we saw in the Holylands last year.
"However, police and partner agencies responded to numerous reports of unacceptable anti-social conduct and young people drinking alcohol in the street.
"In fact, the majority of those arrested were under the influence of alcohol."
Both Queen's and Ulster University had urged students to stay away from the area, and some off-licences closed for several hours on Friday evening.
A family-friendly festival aimed at "re-awakening" community spirit was also held in the Holylands to promote a more positive image.
South Belfast Alliance MLA Paula Bradshaw thanked police for their operation surrounding St Patrick's Day.
"However, it is extremely disappointing some watching the main parade in the city centre decided to participate in pro-IRA chanting. It certainly did not serve to foster the inclusive atmosphere which St Patrick’s Day should provide," she said.
Meanwhile, thousands of people dressed in green converged on central London as the city celebrated its annual St Patrick's Day parade yesterday.
The parade, which has been celebrated since 2001, started in Hyde Park Corner before travelling down Piccadilly and Regent Street and finishing up by Trafalgar Square.
Broadcaster Dara Ó Briain acted as the grand marshal, with fellow comedian Jarlath Regan hosting the entertainment.
London mayor Sadiq Khan spoke to revellers from the main stage, while there was music from Liam O Maonlai, Lisa Lambe, Jack L and Derek Ryan.
