Two people have been arrested.

Kansas City fire department said one person has been killed, three are in a critical condition, five are in a serious condition, and one is in a non-life threatening condition.

Kansas City Police said earlier on X: "Shots were fired west of Union Station near the garage and multiple people were struck. We took two armed people into custody for more investigation."

They added: "Anyone nearby needs to leave the area as quickly and safely as possible to facilitate treatment of the shooting victims. Please avoid the Union Station parking garage area to allow first responders through.

"We request witnesses to the shooting to please go to the southwest corner of Pershing and Main."

Quarterback Patrick Mahomes posted on social media: "Praying for Kansas City."

Chiefs linebacker Drue Tranquill posted on social media: "Please join me in prayer for all the victims in this heinous act. Pray that doctors & first responders would have steady hands & that all would experience full healing."

Offensive lineman Trey Smith thanked first responders, adding: "You're the ones who should be celebrated today."

The parade rally was taking place directly outside Union Station.

Thousands were in Kansas City to celebrate the Chiefs' Super Bowl victory over the San Francisco 49ers in Las Vegas on Sunday.