Two of the people arrested over a shooting at the Kansas City Chiefs' Super Bowl parade are juveniles, according to police, and more than half of the victims are under 16.
The barrage of gunfire outside a nearby former train station in Kansas City, Missouri, sent crowds of fans at the rally running for safety.
One person - a local radio DJ named locally as Lisa Lopez-Galvan - was killed and 21 others injured. Three suspects were arrested in the aftermath.
Officers are questioning the three suspects, two of whom are juveniles, police said today.
Police previously said all the victims were hit by gunshots, including seven who were seriously injured and six who were described as "moderately" wounded. They were being treated in three different hospitals.
The team's stars reacted with horror after the shooting.
The Chiefs' star quarterback Patrick Mahomes wrote on X: "Praying for Kansas City," shortly after the incident, while Travis Kelce, a Chiefs linebacker and boyfriend of Taylor Swift, said in a statement on Wednesday: "I am heartbroken over the tragedy that took place today.
"My heart is with all who came out to celebrate with us and have been affected. KC, you mean the world to me."
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The mass shooting unfolded amid huge crowds at the Super Bowl celebration and appeared to stem from an argument between several spectators, authorities said today.
Police Chief Stacey Graves said a mother of two was killed in the violence.
He also confirmed 22 people injured in the shooting ranged between the ages of eight and 47 years old.
Half of the wounded were under the age of 16, he added.
Ms Lopez-Galvan was identified by radio station KKFI-FM, host of "Taste of Tejano" as the victim in the gun spree.
Her DJ name was "Lisa G" and she was described as an extrovert and devoted mother from a prominent family in the area, said Rosa Izurieta and Martha Ramirez, two childhood friends who worked with her at a staffing company.
"She's the type of person who would jump in front of a bullet for anybody - that would be Lisa," Ms Izurieta said.
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