"We are concerned about recent reports that the Government of Bangladesh may pursue a tax evasion case against Dr. Yunus," the State Department said in a statement yesterday.
It said the US has long admired and supported Professor Yunus's significant achievements in improving the lives of Bangladesh's most vulnerable citizens, particularly women.
"We urge the Government of Bangladesh to treat Dr. Yunus in a fair and transparent manner, in keeping with Bangladeshi law and the principles of due process," the department said.
"We also support the continuation of the Bank's unique governance structure. We look forward to the selection of a highly qualified and acceptable managing director and a new chairman who are committed to sustaining the Bank's success," it said.
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The department noted that Grameen Bank is an engine of social entrepreneurship and prosperity for millions of Bangladeshis, and has an impressive track record improving the lives of the poor, especially women and girls.
A Bangladesh minister had alleged the eight companies owned by Yunus had obtained tax benefits in the name of the Grameen Bank.
Yunus, in a statement, claimed he did not breach any law.
"Grameen Bank was created by a special law. The board of directors holds absolute power under the law. Whatever Professor Yunus did, he did with the permission and consent of this powerful board," the statement said.