Wealthy tax evaders with assets stashed offshore can come clean with U.S. authorities under a new amnesty program letting them pay taxes with reduced penalties, the government said on Tuesday.

The U.S. has been stepping up efforts to combat offshore tax evasion since UBS AG settled fraud cases with the government, while admitting it actively helped U.S. citizens avoid taxes.

Internal Revenue Service Commissioner Doug Shulman also said that a number of other banks are under probe, including some cases that are in quite advanced stages.

(Reporting by Kim Dixon)