Two teenagers, aged 15 and 17, have suffered burns after an arson attack at a changing room in Cosham in Portsmouth.
The arson happened sometime between 10pm and 10.30pm last night at the changing rooms at King George V playing fields.
A 14-year-old boy from Hursley has been arrested on suspicion of arson and a 17-year-old boy from Portsmouth has been arrested on suspicion with arson with intent.
The 17-year-old has been discharged from hospital and the 15-year-old is being moved to Salisbury Hospital.
A police cordon remains in place at the scene.