A police officer has received hospital treatment after he was bitten by a dog.
Police said a Staffordshire bull terrier attacked the officer after he and a colleague stopped a car shortly after midday in Tewkesbury Road, Twigworth near Gloucester.
Gloucestershire Police said that inside the car was the driver, his passenger and the dog.
One officer was bitten by the dog and suffered puncture wounds to his arm. He was taken to Gloucestershire Royal Hospital for treatment.
The two male occupants of the car were arrested on suspicion of drugs possession. One was also arrested on suspicion of theft and the second on suspicion of an offence under the Dangerous Dogs Act, a Gloucestershire Police spokeswoman said.
The Staffordshire bull terrier was locked inside the car until dog handlers arrived at the scene to detain the animal.
Armed police also attended, as a precaution, until the dog was safely removed from the car.