The Premier League match between Watford and Chelsea at Vicarage Road has been briefly halted.
This is due to a medical situation affecting a fan in the stands.
Chelsea’s medical personnel dashed across the field to assist the sufferer, who is thought to have had a heart attack.
The players were then told to leave the field and head to the locker room to get warm as medics performed CPR on the fan.
Watford’s official Twitter account wrote: “There is a break in play due to a medical emergency in the crowd. Both teams have left the field.”