Gannett Co. (GCI) said it would cease print publication of the Tucson Citizen on Saturday after the publisher failed to find a buyer for the Arizona evening newspaper.

The industry has faced one of the most challenging operating environments in decades, as advertising slumps amid the recession and a move to online, which has forced some papers to reduce their delivery services or scrap the print model entirely in favor of an online-only presence.

Gannett said in January the newspaper was up for sale and that it would close the publication by March 21 if a seller couldn't be found. Several potential buyers stepped up, but a deal ultimately wasn't reached.

"Dramatic changes in our industry combined with the difficult economy - particularly in this region - mean it is no longer viable to produce two daily printed newspapers in Tucson," said Bob Dickely, president of the U.S. Community Publishing division of Gannett.

The region is also served by a larger morning daily newspaper, the Arizona Daily Star, which has a joint operating agreement with the Tucson Citizen.

Founded in 1859, the Citizen, published Monday through Saturday afternoon, as been part of Gannett since 1976. The newspaper has an average daily circulation of just under 20,000.

Gannett said the Citizen's Web site will continue to operate. Last week, the newspaper's editor Jennifer Boice said the paper would continue publishing on a day-to-day basis while negotiations over its potential sale continued.

Dickely said the company's partnership with Lee Enterprises Inc. (LEE) would continue with a printed version of the Tucson Citizen editorial in the Arizona Daily Star weekly.

Gannett's shares were down 2.5% to $4.30 in recent trading. The stock has been steadily declining since 2004 and has lost 79% of its value from September.

   -By John Kell, Dow Jones Newswires; 201-938-5285; 

john.kell@dowjones.com