VENTURA, Calif., June 27, 2013 (GLOBE NEWSWIRE) -- Clean Diesel Technologies, Inc. (Nasdaq:CDTI) ("CDTi" or the "Company") announced today that it has commenced a registered public offering of shares of its common stock and warrants to purchase shares of common stock pursuant to its existing shelf registration statement, subject to market and other conditions. The Company also intends to grant the underwriter of the public offering an option to purchase additional shares and/or warrants to cover over-allotments, if any, exercisable for 30 days. The Sole Manager for the public offering is Roth Capital Partners, LLC. In addition, CDTi intends to concurrently convert $235,000 of principal and interest due June 30, 2013, pursuant to loans made to the Company by one of its principal lenders and largest shareholders, to common stock and warrants, and to sell $100,000 of common stock to one of its directors in a private placement. The public offering will be made pursuant to a shelf registration statement on Form S-3, including a base prospectus dated May 21, 2012, previously filed and declared effective by the Securities and Exchange Commission (the "SEC"). A preliminary prospectus supplement related to the offering has been filed with the SEC and is available on the SEC's website located at http://www.sec.gov. Copies of the preliminary prospectus supplement and related base prospectus may also be obtained from Roth Capital Partners, LLC at 888 San Clemente Drive, Newport Beach, CA 92660, or by telephone at (800) 678-9147, or by e-mail at firstname.lastname@example.org. Before you invest in the public offering, you should read the prospectus in that registration statement and related prospectus supplements and other documents that the Company has filed or will file with the SEC for more complete information about the issuer and the public offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, you may obtain a preliminary prospectus supplement and accompanying prospectus as indicated above. This press release is neither an offer to sell nor a solicitation of an offer to buy any of these securities and shall not constitute an offer, solicitation or sale in any jurisdiction in which such offer, solicitation or sale is unlawful.