Citigroup (C) - Get Report is ¿highly likely¿ to name Robert Rubin, a former Treasury secretary, to serve as the bank¿s interim chairman, The New York Times reported Sunday, citing a person briefed on the situation.

Rubin, who chairs Citi¿s executive committee and has been a close adviser to CEO Charles Prince, would take the reins from Prince while the bank looks for a new permanent chief. Prince

is expected to resign at a board meeting Sunday, according to reports in

The Wall Street Journal

and

The New York Times

.

Calls for Prince¿s ouster have increased since the recent credit crunch forced large banks like Citi to take massive writedowns. Prince would be the second CEO of a major investment bank to leave his job in the wake of the crisis; last week

Merrill Lynch¿s

(MER)

Stan O¿Neal was forced to resign.

Before serving as Treasury secretary during the Clinton administration, Rubin was co-chairman of

Goldman Sachs

(GS) - Get Report

.

Citi shares finished Friday at $37.73, down 78 cents, or 2.0%.