SEOUL South Korea -- South Koreans mourned and searched for their lost relatives during the "hell-like" chaotic scene that killed around 150 individuals, mostly young adults at a massive Halloween celebration crowd swarmed into a small alley in the nightlife district in Seoul. It was not clear what caused the crowd of people to flood into the alleyway that runs downhill located in Itaewon area on the night of Saturday, but authorities promised to conduct a thorough investigation. People who witnessed the incident said that they were thrown over one another "like dominoes" and some of the victims had blood…