Station Niagara received a report of a collision approximately 5NM north of the mouth of the Niagara River between a sailing vessel and a power driven vessel with 2 people on each vessel. Station Niagara responded and determined that there were no injuries and no pollution. SN conducted a post-SAR boarding and determined that the sailing vessel was under sail on a course of 000 heading out of the Niagara River when the power driven vessel crossed its bow. The boarding officer with concurrence of Sector Buffalo Enforcement cited both vessels with a violation fer negligent operations due to the fact that neither vessel had a lookout and were not paying attention to navigating their vessels.