A Toyota spokesman says the automaker doesn't plan to release the results of its probe into complaints of unintended acceleration until the government finishes its own investigations.

Toyota Motor Corp. spokesman Mike Michels says the carmaker's examination of more than 2,000 complaints of surging cars is far from complete. Several government agencies, including NASA and the Department of Transportation, are also conducting their own probes into complaints of unintended acceleration.

Michels says the automaker has found a number of causes for unintended acceleration so far, including misplaced floormats, sticking gas pedals and driver error in some cases.