A party in Tarbolton has led to an outbreak of coronavirus putting South Ayrshire at risk of level four lockdown.
The party, which was attended by 17 people, has been blamed for a spike in Covid cases in the region.
Over the last seven days, 17 people have tested positive in Annbank, Mossblown and Tarbolton neighbourhood.
The leader of South Ayrshire Council Peter Henderson says the gathering allowed the virus to spread pushing the number of cases up.
Councillor Henderson told West FM: "It's not just the 17 people, it's all those they have been in contact with too. The track and trace system worked very well.
"But that incident put out figures up and, to be fair to the government, they can only look at that data and trends. We have gone up rather than level off."
It comes after the First Minister told MSPs earlier this week that South Ayrshire was one of the local authority areas 'causing concern'.
Nicola Sturgeon said on Tuesday that the rising number of cases will be monitored.
South Ayrshire is currently at level three, with a level four lockdown meaning all hospitality venues and non-essential shops would be forced to close.
NHS Ayrshire and Arran say they have noticed "sustained community transmission" of coronavirus throughout Ayrshire.
Dr Joy Tomlinson, Joint Director of Public Health said: "This is a continually evolving situation. However, the testing system is working well, which means we are identifying community cases and completing contact tracing quickly. This allows people to immediately self-isolate when required.
A Police Scotland spokesperson said: "We received a report of a gathering at a property on Cunningham Street, Tarbolton, around 2.15am on Saturday, October 31.
"Officers attended and 17 fixed penalty notices were issued and the group were dispersed that day. A 22-year-old woman was also arrested in connection with road traffic offences."