A man and a woman have been arrested on suspicion of murder following the death of a six-year-old girl at a Hampshire campsite.
The youngster is believed to have suffered a cardiac arrest after having a fit at the Holmsley camp site in the New Forest.
Emergency crews say they arrived to find the girl's parents frantically trying to revive their daughter using CPR in the early hours of this morning.
Police are now trying to piece together the events leading up to the girl's cardiac arrest.
The girl and her parents were thought to have just started their Easter holiday when the tragedy happened.
It is not known whether the two people arrested - a man aged 30 and a woman aged 40 from Gosport - were the girl's parents.
It was understood they were arrested at the campsite by detectives called in after medics became suspicious.
Sergeant Heather McNicol, from Hampshire Police, said: 'When a six-year-old child is found, then initially we have to think it's a suspicious death.
'But until there is a full post-mortem examination, we do not know what the cause of death was.
'There is a long way to go before we know if there's any foul play. But whether it's foul play or not, it's a tragedy.'
'It was part of a group of four tents, owned by four families, and they had been making a bit of noise last night, going back and forth between the toilet blocks.
'Police were everywhere and asking me if I heard anything but there was no real commotion.
Another witness, who did not want to be named, said she was woken by the sound of screams and someone repeatedly pressing a car horn before police and paramedics arrived.
A spokesman for South Central Ambulance Service said the girl was 'fitting and not breathing'.
He added: 'A double-manned ambulance was sent with an emergency care practitioner.
'The child went into cardiac arrest and adrenalin was administered.'
'It was the ambulance crew which decided that the police should be called in, but I do not know at this stage what circumstances led to them making that decision,' he added.
A Home Office pathologist was put on standby today to carry out a post-mortem examination on the young girl's body.
The autopsy was expected to be carried out in the mortuary at Southampton General Hospital.