Four people have been injured, two badly, following a dog attack.
North Wales Police went to an address on the Llŷn peninsula in Gwynedd on Friday morning, after reports of a dangerous dog.
Two people were airlifted to hospital with serious injuries, and another two had minor injuries.
The dog involved was destroyed, and is yet to be examined to establish the breed. A total of 37 dogs and a number of cats were seized from the address.
One person was taken by air ambulance to Royal Stoke University Hospital, while the other was taken to Aintree University Hospital, Liverpool.
Councillor Gareth Williams said the attack was in Rhydlios: "As a community, there's a sense of shock and concern at the news.
"My biggest concern is the fact that there is a public footpath not far from the house, and also families that live in close proximity."
He said that "our thoughts are with everyone concerned" and hoped that they all make a quick recovery.
Police remained in the area on Saturday while inquiries continue.
Ch Supt Sian Beck said: " We understand this was a concerning incident in the local, and wish to reassure the community that there is no further risk to the wider public.
"We have launched a joint investigation with the RSPCA."
The force is appealing to anyone with any information to get in touch.