Giant mutant super rats immune to poison are invading English cities.
Rats as big as 60 centimetres have been found in Liverpool where the problem appeared to be at its worst, but sightings had also been made in other cities including Birmingham and London.
Liverpool pest controllers working in the city said some disease-carrying rodents were the size of small cats and were becoming resistant to the bait used to kill them.
Sean Whelan, of Whelan Pest Prevention, told the Liverpool Echo: "All around Merseyside there's been a problem.
"We're seeing bigger rats in Liverpool. They're super rats in my opinion."
Rat-catchers said the rodents were feeding on bins from takeaways and restaurants.
"Access to food is so easy for them," Whelan said.
"They're like humans, they eat and eat and get bigger and bigger."
Across England, councils have seen a rise in the number of rats being reported. In June last year Adrian Whitaker came across this monster behind his dishwasher in Highgate.
Birmingham had the highest number of callouts with 5100 in the past year, the Daily Mail reported.
Liverpool council has also reported a recent rise in the number of rats - 2008 last year compared with 1860 in 2012.
The problem was not just confined to Britain.
Other huge rodents have been caught recently in homes in Sweden and the Republic of Ireland, where one rat was trapped by pest control after terrorising an Irish family in south Dublin.
The Dublin-based "monster vermin" was 60cm long and began terrorising Grace and Ian Walters' home in Kingswood shortly after they moved in, DNews reported.
They heard loud scratching coming from inside their roof and called in pest controllers.
Despite luring the beast into a trap the controllers had to remove it by hand, alive, because it was so big.