NEW YORK CITY (AP) -- The Yankees and Mets are asking the city for $450 million more in public bonds to finance their new ballparks, on top of the nearly $1.5 billion they were already granted, according to the city's Economic Development Corp.

The teams are requesting the additional financing in applications filed with the city ahead of a public hearing on the funding next month. The applications have not yet been made public, but the city shared details in response to questions from The Associated Press.

In the Yankees application, the team is asking for another $259 million in tax-exempt bonds and $111 million in taxable bonds, on top of the $940 million in tax-exempt bonds and $25 million in taxable bonds already granted for its $1.3 billion stadium.

The Mets are requesting an additional $83 million, on top of the $615 million already approved for their $800 million park.

The city's Industrial Development Agency must hold a hearing before granting any additional public support for the multimillion dollar ballparks, which are both expected to be completed next year. Mayor Michael Bloomberg and other city officials have long insisted that the city reaps economic and other benefits from having the private stadiums in the Bronx and Queens.

As part of a deal still being worked out for the additional financing, city officials say the Yankees have agreed to some givebacks. Those could include putting money into the public parks and infrastructure near their new home in the Bronx.

The original financing plans were negotiated in 2006, but both teams indicated earlier this year that they intended to ask for more help as costs for the new parks began to increase.

The additional cost to the city resulting from the use of tax-exempt bonds is expected to be $16 million for the Yankees deal, and nothing extra for the Mets deal because that financing was already figured into the plan approved in 2006 as a "contingency."

The Internal Revenue Service recently updated its rules to limit the way tax-exempt bonds can be used to pay for sports facilities, but after lobbying from the city, the IRS said those regulations will not affect "certain projects substantially in progress," including the two new baseball stadiums.

When it first came to light that the teams intended to ask for more help from the city, that got the attention of lawmakers at the state and federal level who say taxpayers are being cheated in the stadium deals.

Rep. Dennis Kucinich, an Ohio Democrat who heads the House Oversight and Government Reform Committee, has accused the city of misrepresenting the value of the Yankee land to get special tax deals from the IRS. He has said he believes there is "waste and abuse of public dollars" in the deal.

And State Assemblyman Richard Brodsky is also investigating the projects. He believes the financing agreements were hammered out without taxpayer input.

(Copyright ©2008 by The Associated Press. All Rights Reserved.)