TOKYO (Reuters) - Japan's Toshiba Corp <6502.T> said it has asked financial regulators to extend its Tuesday deadline for submitting official third-quarter earnings until April 11.

Toshiba also said in a statement that its auditing committee had confirmed that management at U.S. nuclear unit Westinghouse had inappropriately exerted pressure with regard to the calculation of the acquisition price of the CB&I unit.

It would be the second extension after Toshiba postponed its earnings filing a month ago to probe potential problems at Westinghouse. It has flagged a $6.3 billion writedown for the nuclear unit in preliminary estimates.

(Reporting by Makiko Yamazaki; Editing by Chang-Ran Kim)