(NewsNation) — One person is dead and 22 others were injured after police say a dispute between several people broke out into gunfire Wednesday at the Kansas City Chiefs Super Bowl parade in Missouri.

Kansas City Mayor Quinton Lucas held a news conference Thursday morning to provide updates on the investigation into Wednesday’s shooting.

Preliminary investigations show there were no threats to terrorism or homegrown violent extremism, Kansas City Police Chief Stacey Graves said.

“We experienced a tragic event during a time that was meant for celebration,” Graves said during the news conference Thursday. “The law enforcement response was exemplary. Those who attended also responded and helped one another.”

Graves publicly thanked the good Samaritans who physically stopped a person believed to be involved in the incident.

Police have not disclosed the identities of three people who have been detained or said whether any of them will face charges. Graves said two of the three people are juveniles, and police recovered several firearms.

No charges have been filed yet as police continue to investigate the involvement of others. Graves has called for any witnesses to come forward with information they may have.

The woman who died, Lisa Lopez-Galvan, 43, was a Kansas City radio DJ and mother of two, according to radio station KKFI’s Facebook page.

The other 22 people injured were treated for their injuries at local hospitals.

Half of the injured are under 16 years old.

Stephanie Meyer, senior vice president and chief nursing officer at Children’s Mercy Hospital, said they treated nine children for gunshot wounds, and 12 people total. All but three of the children the hospital saw were able to leave the hospital as of Thursday afternoon, she said.

Examples of heroism were displayed amid the chaos Wednesday. Two people, Trey Filter and Paul Contreras, tackled a person running from the scene. Trey’s wife, Casey Filter, removed his gun while the two men held the person down until police could come help.

“We just did what we felt we needed to do in that moment. I don’t think we could have just walked away being right there like that,” Casey Filter said Wednesday on NewsNation’s “CUOMO.”

The shooting has shaken the community, upending what was supposed to be a joyous day celebrating the Chiefs’ second straight Super Bowl win.

“It’s just so crazy to see something like this. You expect something like this to happen so far away from you, and to see it on the news,” Paul Contreras’ daughter, Alyssa Marsh-Contreras, said on NewsNation’s “Banfield.” “For it to be just a couple yards, a couple feet away, it’s very scary.”

One woman, Bridget Barton, said she was enjoying the Kansas City Chiefs parade with her family when gunfire erupted. When she got home and opened her backpack, she found a bullet lodged deep within one of her blankets, which she is now turning in as evidence to the police.