The Kansas City Chiefs cancelled all team activities scheduled for Thursday after defensive lineman BJ Thompson suffered a seizure during a special teams meeting and went into cardiac arrest, NFL Network Insider Tom Pelissero reported, per sources.

Kansas City’s medical staff worked quickly before an ambulance was called, and Thompson is currently in stable condition, Pelissero added.

The Chiefs announced earlier Thursday that the day’s OTA session was cancelled following a medical emergency that occurred at the team facility.

Thursday’s media availability (head coach Andy Reid and select players) has been re-scheduled for Friday, June 7.

Thompson, a 2023 fifth-round pick, appeared in one game during his rookie season.

The defending Super Bowl champions are currently in Phase 3 of their voluntary offseason program. Mandatory minicamp is scheduled to begin on June 11.