UPDATES:

(Feb. 10, 11:07 am CT): Campbell's agent, Ray Flynn, released a statement on Sunday morning:

(9:50 pm CT): Aisha Praught-Leer, a professional distance runner who represents Jamaica, tweeted that Ray Flynn told her that Campbell's CT scan and echocardiogram came back with promising news:

I saw @RayPFlynn in the hotel lobby. He says Kemoy’s CT scan and echocardiogram were clear. That’s all I know for now. ❤️

— Aisha Praught Leer (@aishapraught) February 10, 2019

(7:21 pm CT): Andre Lowe of Jamaica Gleaner reports that Campbell is in stable condition:

According to his agent Ray Flynn, Kemoy Campbell is in stable condition and is being treated by some of the best medical professionals. He had been complaining that he was not feeling well recently. His partner and brother are by his side at the hospital.

— Andre Lowe (@AndreLoweJA) February 10, 2019

(6:24 pm CT): According to an email from Ray Flynn, Kemoy Campbell's agent and Millrose Games meet director, Campbell is being treated at New York Presbyterian Columbia Medical Center.

(6:13 pm CT) Sports Illustrated's Chris Chavez reports that Campbell has a pulse, and is breathing with assistance. According to Chavez, Campbell will stay overnight at the hospital in the intensive care unit (ICU).

An update I just got on Kemoy Campbell is that he is in the hospital. Still trying to figure out what happened.

“He has a pulse. Assisted breathing right now in CAT scan. Going to keep him overnight in ICU”

— Chris Chavez (@ChrisChavez) February 10, 2019

The original story appears below:

Jamaican professional distance runner Kemoy Campbell collapsed while rabbiting the men’s 3,000m race on Saturday at the Millrose Games in New York City. According to NBC's Lewis Johnson, who was there on the scene, EMTs "shocked" the unconscious athlete to help revitalize him.

Campbell fell to the infield shortly after completing the fifth lap, and he remained down for 15 to 20 minutes as paramedics and event staff attended to him. The men’s 3,000m was completed while Campbell was down on the ground.

Kemoy Campbell had an medical incident on the track, he was properly treated by multiple physicians and are thoughts and prayers are with him for a speedy recovery

— The Armory (@ArmoryNYC) February 9, 2019

The Olympian was eventually carried away in a stretcher to a nearby hospital. We'll update this story as we learn more.