The online versions of today's New York City newspapers are giving more details about the story that the sweeps-month coverage of the television stations. One ex-employee told the New York Daily News there is a hole in the wall behind the grill that allows rats to come in from the back of the building: http://www.nydailynews.com/front/story/500342p-421877c.html
Comments from the franchisee were printed in the New York Post. They blame a construction project in the basement of the building: http://www.nypost.com/seven/02242007/news/regionalnews/rats_all__folks_regionalnews_john_mazor_and_lukas_i__alpert.htm
All in all, the media is having a lot of fun with this. Go to Google News and type in rats Taco Bell. You will get hundreds of hits, most for newspapers and other outlets that carried the story from a wire service. But, many ran their own headline, and some are really funny.
Some of the headlines:
Blessed Be This KFC Fish
Yum!my Down on Rats
Rats on the Loose!
WOULD YOU LIKE FRIES WITH RAT?
Rats All, Folks
NYC rats race to KFC feast
New York rat race: Rodents invade KFC, Taco Bell restaurant
Taco Bell ratted out by squirmin' vermin
Taco Bell can't exterminate bad news
New York City: With rats at play, diners stay away
Chicken, burritos, rats at KFC-Taco Bell outlet
Fast food for the rat pack
Urban vermin think outside the bun
While owner's away ... ... rats play, wreak publicity havoc for NY restaurant
I didn't make any of these up. They are from media outlets that carried the story Yum! refers to Yum! Brands, parent of KFC, Taco Bell, and Pizza Hut.