A months-long investigation revealed detailed evidence of the massacre of dozens of civilians in the Tigray region of northern Ethiopia. The following report broke the information blackout surrounding a pattern of atrocities that may have claimed thousands of civilian lives. Since November, the Ethiopian government has waged war in the Tigray region with the help of neighboring Eritrean troops. Journalists have been severely restricted in their access, but in this exclusive report, CNN has been able to speak to dozens of people who say they witnessed a massacre by invading Eritrean troops in a Tigray town on one of its holiest days, on November 30 last year. We must warn that what you are about to see and hear is disturbing.