Former International Monetary Fund (IMF) chief Dominique Strauss-Kahn has been released from house arrest after prosecutors raised questions about the credibility of the hotel maid accusing him of sexual assault.A New York judge agreed to return Strauss-Kahn's bail and lift some pre-trial restrictions on his movements. Strauss-Kahn's lawyer said he is now free to travel within the United States. The court, however, has not returned his passport.A prosecutor said a thorough probe has been conducted on the case, including the background of the maid, her statements about the incident and her past activities. But the prosecution said it is not yet moving to dismiss sexual assault and attempted rape charges against Strauss-Kahn.The veteran French politician was arrested in May on charges he attacked a 32-year-old African immigrant who came to clean his suite at a luxury New York City hotel. The arrest prompted his resignation from the IMF. The next court date is set for July 18.Former French Finance Minister Christine Lagarde was recently chosen to succeed Strauss-Kahn at the IMF.