CLEVELAND, Ohio - Three Cleveland mayoral candidates who filed nominating petitions last week are in jeopardy of not qualifying for the September primary ballot.

Tony Madalone, Eric Brewer and Robert Kilo failed to collect the 3,000 valid voter signatures needed to make the ballot. They have until 4 p.m. today to submit new signatures.

The Cuyahoga County Board of Elections says that Madalone, founder and CEO of the Cleveland based custom T-shirt business Fresh Brewed Tees, needs the most - 1,096. Brewer, a former East Cleveland mayor, needs 970 and Kilo, a former state director for Fellowship of Christian Athletes, needs 610. The city's election bylaws allow each candidate five days to secure additional signatures.

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Madalone and Brewer have been particularly critical of Mayor Frank Jackson, who is seeking a fourth term and has already qualified for the ballot.

Madalone told cleveland.com last month that Jackson is a failure, charging that the three-term incumbent has tried and failed to fix the city's biggest problems -- or has ignored them.

"But either way, you have failed." Madalone said in June.

Madalone also told cleveland.com last month that he was confident he'd easily collect enough signatures.

UPDATE: In an email, Madalone said his campaign submitted an additional

2,654 signatures today.

"We're confident that at least 1,096 of the 2,654 will be verified," he said.

Nine people filed for the race, including Cleveland City Council members Zack Reed and Jeff Johnson; Brandon Chrostowski, leader of the nonprofit EDWINS Leadership and Restaurant Institute; Dyrone W. Smith, a former economics student at Cleveland State University; State Rep. Bill Patmon. Their voter signatures have been validated.

Two others - James Jerome Bell and Camry S. Kincaid - successfully filed to be write-in candidates.

Reed and Johnson have also been vocal critics of Jackson. Johnson's supporters, for instance, recently demonstrated against Jackson during a high-dollar fundraiser in Gates Mills.