UPDATE: Crashes have been cleared from Interstate 25, allowing traffic to resume in both directions. At least one person was reported killed in the rollover crash that caused the northbound delays, CBS 4 reports.
7 a.m.: I-25 northbound is entirely closed at 104th Avenue in Thornton, due to a crash, CDOT reports. Meanwhile, multiple southbound lanes are also blocked at 136th Avenue because of a crash.
Thornton police say the northbound delay is due to a "serious crash."
