Police say 1 dead, up to 15 injured after shooting near Kansas City's Super Bowl parade

Warning: This story contains graphic images of wounded victims.

One person was killed and up to 15 were injured in a shooting at the end of the parade to celebrate Kansas City's Super Bowl victory, sending terrified fans running for cover and marring yet another high-profile public event with gun violence.

Kansas City Police Chief Stacey Graves detailed the shooting's toll at a news conference and said two people had been taken into custody. She said she has heard that fans may have been involved in apprehending a suspect but couldn't confirm that.

"I'm angry at what happened today. The people who came to this celebration should expect a safe environment," Graves said.

Social media users posted shocking video. One user's video showed someone apparently performing chest compressions on a shooting victim as another person, seemingly writhing in pain, lay on the ground nearby. People screamed in the background.

Another video showed two onlookers chase down and tackle someone, holding that person down until two police officers arrived.

Lisa Money of Kansas City, Kan., was trying to gather some confetti near the end of the parade when she heard somebody yell, "Down, down, everybody down!"

At first, Money thought somebody might be joking, until she saw the SWAT team jumping over the fence.

Kevin Sanders, 53, of Lenexa, Kan., said he heard what sounded like firecrackers and then people running. After that initial flurry, calm returned, and he didn't think much of it. But he said 10 minutes later, ambulances started showing up.

"It sucks that someone had to ruin the celebration, but we are in a big city," Sanders said.

Lisa Augustine, spokesperson for Children's Mercy Kansas City, said the hospital "is receiving patients