An 83-year-old woman is fighting for her life after being savaged by a dog in a horrific attack.
Specially trained firearms officers, police and paramedics were called to the home in Caerphilly, South Wales, on Saturday.
The pensioner suffered life-threatening injuries in the attack just half a mile from a property where a 10-year-old boy was killed by another dog a year ago.
She was taken to hospital, as well as a 55-year-old man who sustained minor injuries.
Three people - two men, aged 20 and 31, and a woman of 28 - were arrested on suspicion of being in charge of a dog dangerously out of control causing injury. They were later released on bail.
The dog was seized by police officers before being put down. No other dogs were involved in the attack.
Gwent Police said the woman, who hasn't been named, sustained life-threatening injuries while the 55-year-old man was taken to hospital with minor injuries.
Det Ch Insp Matthew Sedgebeer said: "Officers will be making further enquiries at this time and will remain at the scene as the investigation progresses."
He added that residents may see ongoing police activity in Caerphilly as part of the investigation, but said there was no cause for alarm.
The attack follows campaign by the local MP for tougher sentences for dog attacks after schoolboy Jack Lis was killed by a seven-stone XL Bully named Beast.
Wayne David MP is calling for a change in the law to make sure owners have a responsibility to train their dogs properly so they are not a threat.
Mr David, 65, says he will "continue to campaign until the law is changed" after progress stalled in Westminster.
He added: "Following Jack's death, I secured an adjournment debate on the floor of the House of Commons about Jack's death and the inadequacy of the law on dangerous dogs.
"There was an encouraging response from the minister at the time but little has happened since.
"The government is continuing to examine academic and professional opinion on the issue of dangerous dogs.
"But the political instability inside government has contributed to them being unable to come forward with proposals for changes to the law.
"This is a terrible shame because I believe there is an emerging consensus on how the whole approach to dangerous dogs, and dogs generally should be changed."
