Transcript for Ohio mass shooting leaves 9 dead, 16 injured
eyes, the news of another massacre just 13 hours later, in time in Dayton, Ohio. A lone gunman attacking a popular area for night life in downtown Dayton. Running from the gun fire there, he killed nine and injured 16. Tonight, we learned among the dead, the gunman's own sister. Alex Perez is in Ohio tonight. Reporter: Downtown Dayton erupting in chaos, gunfire piercing the night just after 1:00 A.M. We got shots fired. We got multiple people down. We're gonna need multiple medics. Reporter: The area, called the Oregon district, packed with restaurants and bars. We got like 9 or 10 shot. Reporter: This surveillance video shows people running for their lives and police engaging with the suspect. Had a vest on, earmuffs and just started blowing bullets everywhere. I'm safe, there is casualties everywhere. Reporter: At least 27 were hurt, some shot multiple times as they fled. I instantly started trying to run, but I realized my cousin wasn't at my side, and when I looked back that's how I was able to see that people were actually falling from being hit by bullets. Most of us can't get to our cars because there are bodies scattered all over. Reporter: First responders treating victims on the street, at least nine people, five men and four women, were killed just hours after the massacre in el Paso. The alleged shooter, identified as 24-year-old Connor Stephen BETTs, killed by police who say he wore body armor and a face mask, carrying an ak-style rifle and multiple high-capacity magazines. In approximately 20 seconds they engaged the suspect who was attempting to enter a crowded liquor establishment. Reporter: Among the nine victims, the gunman's 22-year-old sister Megan BETTs. Who arrived with the shooter earlier in the evening. And Lois Oglesby who was just 27 years old. Very heartbreaking. I never had to experience it. So close to home. I just wish she would just wake up in a hospital. Reporter: At this point, authorities here say they have not discovered a motive but they have no reason to believe it was motivated by bias or connected to the El Paso shooting. David? Alex Perez live from Dayton tonight. Thank you.
This transcript has been automatically generated and may not be 100% accurate.