Officials have identified what caused a wildfire that burned 130 acres and caused evacuations in Douglas County this week. The Airport Fire, which started Sunday afternoon along train tracks near Highway 85 and is now about 90% contained, was caused by "activity associated with a passing train," the Douglas County Sheriff's Office said in a Wednesday news release. Read more at: https://www.9news.com/article/news/local/wildfire/airport-fire-cause-identified-douglas-county/73-23dadb3f-0f1c-42d6-ae29-adb302f739f2 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 X: 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.