What we know about the deadly Halloween stampede in Seoul A mass of mostly young people among tens of thousands who gathered to celebrate Halloween in Seoul became trapped and crushed as the crowd surged into a narrow alley, killing at least 151 people and injuring 82 others in South Korea's worst disaster in years. SEOUL, South Korea — Originally Published: 30 OCT 22 03:23 ETUpdated: 30 OCT 22 03:45 ET, CNN (CNN) — Most weekends, the narrow alleys of Itaewon, the neon-lit nightlife district in South Korea's capital Seoul, are busy with partygoers and tourists. Now it's the site…