Two Premier League matches were paused due to medical emergencies in the stands on Wednesday, with Chelsea's clash with Watford halted on 13 minutes, while the second half between Southampton and Leicester City was delayed.
Both Chelsea and Watford players were taken off the field by the referee after play was stopped following an incident in the stands at Vicarage Road.
Chelsea defender Marcos Alonso appeared to alert the referee and the medical staff on the touchline about the incident. Chelsea's medics ran across the field to help with the situation.
The score was 0-0 at the time, and play resumed around 30 minutes later.
Some Chelsea players were seen covering their faces as they looked over to where the incident was unfolding.
There is a hospital near the stadium.
Later on Wednesday, the second half at St. Mary's was delayed due to a medical emergency, Leicester City confirmed in a statement.
On Oct. 17, a match between Newcastle and Tottenham was halted for 20 minutes when a spectator suffered cardiac arrest. A doctor who was in the crowd performed chest compressions before paramedics arrived.
Information from Associated Press contributed to this report.