A portion of Interstate 25 south of Castle Rock is closed while crews clean up multiple crashes, including one that involved 20 vehicles. Castle Rock Fire Chief Norris Croom said the 20-vehicle crash happened just before 9 p.m. on northbound I-25 south of the Plum Creek Parkway exit. Two people were treated on the scene, Croom said. No serious injuries were reported. Croom said a fire truck, an ambulance and a battalion chief's vehicle were among the vehicles involved in the crash. Read more at: https://www.9news.com/article/news/local/crashes-i-25/73-aa3311d0-87f4-4101-a0d4-67d0e0489776 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.