Three men wanted for a Phoenix jewelry store robbery were named as prime suspects in the $3.3 million heist of a Tucson bank, largest in the nation's history.

The FBI identified the three as Douglas Bruce Fenimore, 33; Douglas Wayne Brown, 34, and David Lee Grandstaff, 38.

A suburban Tucson branch of First National Bank of Arizona was robbed early Wednesday morning of $3.3 million, all in cash, by a gang of thieves who ordered the branch manager to open the vault at gunpoint.

Warrants were issued for the three in Des Moines, Iowa, in July, 1980, in connection with the robbery in May of that year of $1.5 million from an east Phoenix jewelry store.

The three men were arrested last July after they allegedly tried to sell a Des Moines jeweler items stolen May 22 from G. Darrell Olsen Jewelers in Phoenix. They have been sought since November when they forfeited huge bonds by failing to appear in U.S. District Court in Des Moines.

A fourth suspect in the jewelry store robbery, Michael Gabriel, 37, was convicted and sentenced to 12 years in prison.

Grandstaff and Fenimore also were charged last September with a $500,000 jewelry store robbery in Walnut Creek, Calif.