The Swiss bank engaged in a “pattern of obstruction” by not sharing some information during past investigations into the lender’s ties to Nazis, the Senate Budget Committee said.

Swiss bank UBS is working with an independent ombudsman to shed light on Nazi-linked accounts, it said on Saturday, after the Wall Street Journal newspaper reported some accounts at collapsed bank Credit Suisse,

A cache of client files stamped “American blacklist,” a designation for those financing or trading with Nazis or Axis partners, was recently found by investigators probing Credit Suisse, one of Switzerland’s biggest banks and now part of UBS.

UBS faces an unpleasend New Year's surprise in the U.S. An important financial media outlet cites allegations about previously undisclosed Nazi-linked accounts at Credit Suisse. The United States Senate is also involved.

Credit Suisse agreed in 1998 to take part in a $1.25 billion settlement of lawsuits brought by Holocaust survivors

Investigators looking into Credit Suisse’s connections to Nazi-era account holders uncovered new evidence that the bank failed to disclose during earlier probes, US Senate Budget Committee leaders said Saturday.

Fresh look at archives unearthed Nazi-linked accounts discovered by bank in 1990s but never disclosed to investigators.

Swiss bankers sought to cover up the extent to which they helped the Nazis store looted assets during World War II by placing their account information under a secret file with the stamp “American blacklist,