Boulder Police are investigating after five men consumed extreme amounts of alcohol and some took drugs, which led them to become violently ill at Kappa Sigma fraternity on Saturday night. Initial reports from Boulder Police said six men had overdosed during a party on a batch of cocaine that was possibly laced with another drug. On Tuesday, police said they believe at least five men consumed extreme amounts of alcohol and some took drugs. Those drugs do not appear to have been tainted with fentanyl, police said. Read more at: https://www.9news.com/article/news/local/boulder-cocaine-overdose-tainted-drugs/73-b74f89f8-ef70-4005-990a-367cda5bbda9 More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.