Rats aren't only problem in Tehran. These were running free over the weekend in Luton, England. Barcroft Media/Barcroft Media /Landov hide caption toggle caption Barcroft Media/Barcroft Media /Landov The Two-Way Reports: Snipers Deployed To Kill Tehran's Cat-Sized Rats March 4, 2013 The rodents have been a big problem in Iran's capital for years. Efforts to poison them may have run their course. So, according to local reports, sniper teams have been deployed. Some of their targets are quite large — weighing about 11 pounds.