According to Reuters, a Connecticut judge has issued a temporary restraining order freezing the assets of Madoff's wife, brother and sons, and other executives who worked in the Madoff firm.
Madoff said that he acted alone and so far only one other person (a Madoff accountant) has been charged in connection with the fraud. But prosecutors have confirmed to CBS News that Madoff relatives and associates are under investigation.
The restraining order comes in response to a lawsuit filed by the city of Fairfield, Conn.'s pension fund and is in effect until April 13. Madoff's brother Peter Madoff already agreed to have some of his assets frozen in December, according to his lawyer.