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
Brazilian police said no such incident took place and have charged the Olympian with making a false statement.
A boy aged around six or seven was seen being bundled into the side of a black VW van in Redhill, Surrey during rush hour.
Temperature will be cooler all round