The mass shooting that unfolded amid throngs of people at the Kansas City Chiefs’ Super Bowl celebration, killing one person and wounding almost two dozen others, appeared to stem from an argument between several people, authorities said Thursday.
Police Chief Stacey Graves said that the 22 people injured in the shooting ranged between the ages of 8 and 47 years old, half of whom were under the age of 16. A mother of two was killed.
Three people were detained — including two juveniles — with charges soon to be filed, Graves said. Police are calling for witnesses, people with cellphone footage and victims of the violence to call a dedicated hotline.
“We are working to determine the involvement of others. And it should be noted we have recovered several firearms. This incident is still a very active investigation,” Graves said at a news conference.
The shooting outside Union Station occurred despite the presence of more than 800 police officers who were in the building and area, including on top of nearby structures, said Democratic Mayor Quinton Lucas, who attended with his wife and mother and ran for safety when the shots rang out.
Throngs had lined the parade route, with fans climbing trees and street poles for a better view. Players rolled through on double-decker buses as DJs and drummers heralded their arrival.
The police chief said 1 million people likely attended the parade, which occurred in a city of about 470,000 people and a metropolitan area of about 2 million.
“The law enforcement response was exemplary. Those in attendance also responded,” Graves added. “They helped one another and even physically stop a person who was believed to be involved in the incident.”
Meanwhile, police are still asking witnesses to come forward. Many described a sense of confusion that rippled through the crowd.
The rally had just ended and music was still blaring when the shots erupted. Many people initially thought they were hearing fireworks. But then chaos ensued. Some in the crowd hit the ground while others leapt over barriers and sprinted, some carrying children in their arms.
The stunned crowd — some in tears — slowly gathered their belongings, trying to figure out how to get home. Strangers comforted each other as police put up crime scene tape in an area where moments earlier there had been a joyous celebration.
Hank Hunter, a sophomore at a Kansas high school, said he heard shots in the distance while watching the rally with a friend. Initially, they didn’t know what it was, but then “like a chain reaction” people started hitting the ground.
They ran to jump over a barricade and his friend slammed his head into the concrete, Hunter said. A security guard ushered his friend into Union Station, which was closed to the general public, as the players and coaches prepared to leave on buses. There, coach Andy Reid consoled his friend and “just tried to comfort him and calm him down.”
Social media users posted shocking video of police running through Wednesday’s crowded scene. One video showed someone apparently performing chest compressions on a victim as another person, seemingly writhing in pain, lay on the ground nearby. People screamed in the background.
Another video showed two people chase and tackle a person, holding them down until two police officers arrived. In an interview Thursday with ABC’s “Good Morning America,” Trey Filter of Wichita, Kansas, said he saw someone being chased and took action.
“I couldn’t see much. I heard, ‘Get ‘em!’ I saw a flash next to me. And I remember I jumped and remember thinking, ‘I hope this is the fool they were talking about,’” he said. “They started yelling that, ‘There’s a gun! There’s a gun!’”
The Associated Press contributed to this article.