Oct 25 (Reuters) - Tropical Storm Melissa has strengthened into a hurricane, the U.S. National Hurricane Center said on Saturday. Hurricane Melissa is located about 235 miles (380 km) southwest of Port Au Prince Haiti, packing maximum sustained winds of 75 miles per hour (120 km/h), the NHC said in its latest advisory. (Reporting by Chandni Shah in Bengaluru; Editing by Bill Berkrot) (The article has been published through a syndicated feed. Except for the headline, the content has been published verbatim. Liability lies with original publisher.)