The owner of a dog that mauled a woman in Lincoln and left her with serious head injuries has been arrested, police said on Monday.
Armed police and a helicopter were deployed to search a quarry behind Outer Circle Road after the dog, believed to be an American pit bull, attacked the 22-year-old on Sunday.
Lincolnshire Police officers seized the animal at around 1.30am and sent it to police kennels.
An "associate" of the victim, believed to be the dog's owner, was arrested on suspicion of offences under the Dangerous Dogs Act and also for affray, a spokesman for the force said.
Police were due to question the 33-year-old man later Monday and said tests were being carried out to confirm the breed of the animal.
The victim of the attack is expected to undergo surgery at Lincoln County Hospital later.
Medical staff alerted police at around 10.30pm on Sunday after a woman was admitted with serious injuries.
"We have not been able to conduct a full interview with the injured woman due to her injuries," a Lincolnshire Police spokesman said.
"The injuries consist of a serious injury to her scalp, injuries to her face and to her arm.
"She remains on a ward at Lincoln County Hospital and is likely to undergo surgery later today."