Two women, aged 27 and 28, have been arrested on suspicion of an offence under the Dangerous Dogs Act.
It follows the death of a 79-year-old man in the Clubmoor district of Liverpool after a dog attack.
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A rollercoaster has come off the rails at a theme park in Scotland, leaving nine children and two adults in hospital.
"I saw a lot of smoke come out from the tail-end of the aircraft. I wondered if it was normal, whether it was just exhaust fumes."
The House of Commons Petitions Committee has said they will keep an eye on the petition and are concerned about fraudulent signatures.