According to a report in the CET:
"Firebugs started a blaze at the old Coventry City ground just days after the last match was played there.
Fire crews were called to a fire in the grounds of the Highfield Road stadium in Hillfields at 5.50pm last night. They found arsonists had set fire to rubbish and plastic in the car park. They spent 20 minutes putting out the blaze."