Dozens of people have reportedly suffered chemical injuries following a leak at a swimming pool in a Norfolk holiday park.
Police have evacuated the Wild Duck Holiday Park in Belton near Great Yarmouth and both fire and ambulance crews were called at around 2.35pm.
A Norfolk police spokesman said: "It is believed there are around 40 casualties who are being treated by ambulance crews.
"The immediate area has been evacuated and a 20 metre cordon has been put in place around the building whilst emergency services deal with the incident."
Haven Holidays spokesman Tom Cassidy said that 33 people described as "walking wounded" had been evacuated and taken to three different hospitals as a "precaution".
A three-year-old was among the casualties taken to Norfolk and Norwich Hospital, James Paget Hospital in Great Yarmouth or Ipswich Hospital, Mr Cassidy said.
He told the Press Association: "There was a chemical leak in the swimming pool in the entertainment complex and it was evacuated while police and fire and rescue were on their way.
"Thirty-three people have been taken to three local hospitals as a precaution. They include one three-year-old child and a member of staff.
"The casualties have been described to me as walking wounded.
"Obviously the park is now in lockdown while they try and source the chemical leak."
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