Ensure Grameen Bank's effectiveness: US

"We have made clear that we're deeply troubled by the situation regarding Yunus and the letter that Bangladesh Bank sent to Grameen Bank concerning his status as managing director," the State Department spokesman, Mark Toner, said.

"We'll continue, obviously, to monitor the situation closely, and we want to see a mutually satisfactory compromise that will ensure the Grameen's Bank effectiveness," Toner said in response to a question.

Grameen Bank has played a leading role in a global movement to lift millions of the world's poorest people out of poverty using the innovative microcredit concept.