A County Fermanagh man has been fined £1,000 for breaching Covid-19 travel rules - the first person in NI to be sanctioned in this way.
It is understood he went out socialising in Enniskillen on Sunday after returning from holiday in Spain, before later testing positive.
Police confirmed the fine was issued on Tuesday.
It comes as it emerged 23 prohibition notices have been issued to bars since they were allowed to reopen on 3 July.
The notices are issued if a premises breaks coronavirus regulations, and mean the business must rectify the breaches identified by police.
It does not necessarily mean a premises has to close.
Assistant Chief Constable Alan Todd said the notices were served at premises across all counties in Northern Ireland, and had been issued between 8 July and 2 September.
Bars with outside areas are able to serve alcohol on a table-service basis, while inside alcohol has to be served along with a meal, also on a table-service basis.
At the end of August Health Minister Robin Swann said there had been a "blatant disregard" for the regulations by some in the hospitality sector.
The reopening date for indoor pubs which only serve alcohol, theatres and private members' clubs has been pushed back due to the rise in cases of the virus.
Anyone travelling to Northern Ireland from countries not on the so-called green list of exemptions is required to self-isolate for two weeks on arrival.
It is understood the man who was fined had recently returned from the Balearic Islands, as first reported by the Belfast Telegraph.
ACC Alan Todd said the management of Covid-19 travel rules was a matter for UK Border Force, and police acted on its recommendation about potential breaches.
He said police would also "act on any significant concerns raised by members of the public".
"As always, our approach remains to engage, explain and encourage and, only where necessary, enforce," he said.
"Everyone needs to continue to follow the government's guidance to help suppress the transmission of the virus and support our NHS."
He added it was "encouraging to see" that there had been a high level of compliance with the mandatory quarantine on travellers to Northern Ireland.