Buffalo Bills safety Damar Hamlin has suffered a cardiac arrest and is in a critical condition after collapsing during his team's game against the Cincinnati Bengals.
Hamlin fell to the ground after colliding with an opponent during the first quarter of Monday night's NFL game in Cincinnati. The 24-year-old received on-field medical attention for more than 30 minutes, including CPR, before being taken to hospital.
The NFL have confirmed the game has been postponed following the incident and updates on Hamlin's condition will follow in due course. His representative Jordon Rooney has confirmed tests are currently being run and updates will be provided "as we have them".