Five police officers have been taken to hospital after being mauled by a dog during a raid.
The constables were attacked by a "pit bull-type" animal as they attempted to arrest a suspect in east London, Scotland Yard said.
A dog unit and firearms officer were called before the dog was "contained and subsequently shot dead", the force added.
The man - in his 20s - was arrested and is in custody.
More top news
A pregnant woman and a man suffered "severe discomfort" after someone threw bleach at them from a passing car, hitting them in the eyes.
A look at the weather today across the UK.
Former child star Erin Moran who played Joanie Cunningham in the US sitcom "Happy Days" has been found dead at 56.