Expert thinks mutations from radiation and poison have produced a giant rat strain in Tehran

[Emily]

They're using sniper teams to hunt them.

http://www.ynetnews.com/articles/0,7340,L-4347109,00.html

London's Times newspaper says Tehran's environmental agency using sniper teams against rodents running rampant in 26 districts

Ynet
Published: 02.20.13, 08:17
[snip]
Ismail Kahram, a university lecturer and an environmental adviser to the city council, told the website Qudsonline.ir that the rats ?seem to have had a genetic mutation, probably as a result of radiations and the chemical used on them.

?They are now bigger and look different. These are changes that normally take millions of years of evolution. They have jumped from 60 grams (960 ounces) to five kilos (11 pounds), and cats are now smaller than them,? said Kahram...