Several people injured in shooting near Kansas City Chiefs Super Bowl parade

A community that came together to celebrate a dramatic Kansas City Chiefs Super Bowl victory on Sunday is now recovering from a shooting that wounded dozens of people, including children. At least 22 people suffered gunshot injuries and one of them has died, Kansas City officials said Wednesday.

But there is still a lot that police do not know as the investigation gets underway into a tragic ending to a festive day in the Missouri city.

The shooting, which happened after a parade and rally for the Chiefs, is at least the 48th mass shooting in the United States so far this year, according to the Gun Violence Archive.

Here’s what we know so far:

Victims: There are at least 22 people with gunshot wounds, Kansas City Police Chief Stacey Graves said. One of those people has died, said Kansas City Fire Department Interim Chief Ross Grundyson. Some of the shooting victims were children, he added. Officials are still working to identify the person killed.

What we know about the condition of the survivors:

What happened: The shooting happened on the west side of Union Station in downtown Kansas City, Graves said. Though witnesses described watching officers run into the surrounding buildings, the police chief said the incident happened outside. When officers arrived on the scene, they immediately started helping people who were hurt.

People detained: Graves said police have detained three people for further investigation. She said earlier that officers detained two people when they arrived at the scene, with officers even chasing one person. A video has circulated which shows “some fans tackling someone,” she said. Authorities are trying to determine if one of the detained individuals is the same person featured in the video. Graves also said police have recovered firearms.

Key things we don’t know yet:

What is happening now: Police are collecting physical and digital evidence, conducting interviews and asking victims some questions, Graves said. “There’s a lot of work ahead in this is just the beginning stages, but we’re moving as fast as we can,” she said. Federal law enforcement has been assisting, according to the White House.

Reaction: The Kansas City Chiefs organization said in a statement it was saddened by the shooting and called it a “senseless act of violence.” The National Football League said its thoughts are “with the victims and everyone affected” and thanked law enforcement. Some individual players also shared messages of support on social media.