The dog that mauled a baby to death in Blackburn has been described as "very aggressive and dangerous" by a neighbour, who said the animal had previously entered his garden by breaking the fence.
Locals have claimed they reported dangerous dogs at the address of the killing to police.
Chief Superintendent Chris Bithell said Lancashire Police are making inquiries to see whether there have been previous issues with the dog, but that "at this moment it would be too early to speculate on that".
The mother of a baby mauled to death by a dog was downstairs with her boyfriend at the time, police have said.
Chief Superintendent Chris Bithell of Lancashire Police called the incident "absolutely horrific" and said both suspects will be questioned by detectives today.
The baby was upstairs in a bed in one of the front bedrooms and the two people who are currently in custody, they were downstairs when the attack took place.
The mother of an 11-month-old baby girl, mauled to death by a dog, has been arrested on suspicion of manslaughter.
Ava Jayne Marie Corless was in bed at a house in Emily Street, Blackburn, at around 11pm yesterday when she was savaged by what police described as an American pitbull-type dog.
She was pronounced dead in hospital a short time later.
The girl's mother has been named locally as Chloe King and the man in custody was named as Lee Wright, who is not the father of the child.
Police have not confirmed the names of those under arrest.
Neighbours claim to have made previous complaints about the dog's behaviour to police.
An 11-month-old girl mauled to death in Blackburn by an "American pitbull-type" dog has been named by Lancashire Police as Ava Jayne Marie Corless.
Her mother Chloe King, 20, and her partner named as Lee Wright - who is not the child's father - have been arrested on suspicion of manslaughter.
Police are continuing to carry out inquiries in Blackburn after an 11-month-old baby died after being mauled by a dog.
A 24-year-old man and a 20-year-old woman, have been arrested on suspicion of child neglect and are in police custody.
The relationship between the 11-month-old baby and those arrested has not been confirmed.
It is believed the girl was not at her home address at the time of the incident.
Nobody else was injured during the attack.
A 24-year-old man and a 20-year-old woman have been arrested on suspicion of child neglect and are in police custody
An investigation is underway following the death of an eleven month old baby in Blackburn.
At 11pm last night, police were called by the ambulance service to an address on Emily Street following reports a baby had been mauled by a dog.
The child was taken to Royal Blackburn Hospital but died a short time later.
The dog has been destroyed.
Officers are continuing to carry out enquiries at the scene and investigate the circumstances of what has happened.
A 26 year old man and a 20 year old woman have both been arrested and are currently in police custody.
This is a tragic incident and specially trained officers are offering support to the wider family. A full investigation is underway.
With New York Fashion Week well underway, pets in the Big Apple joined in the action with their very own jewel-themed New York Pet Fashion Show.
An actress who was bitten by a police dog after a burglary has received an apology from Scotland Yard.
Juliet Aubrey, 47, was mauled by an Alsatian when she called officers as burglars raided her London home in March 2012.
The dog handler will face misconduct proceedings over the incident.
A Scotland Yard spokesman said: "The MPS has acknowledged that the woman was let down when she called the police for help on 13 March 2012 and has offered her a formal and sincere apology. It would be inappropriate to comment further at this time, pending the outcome of the case."
Aubrey's films include Gloria Woodrow in the Constant Gardener, and she has appeared in a number of TV series such as The White Queen and Silent Witness.