Three people including a child have been injured after an explosion and fire on a boat at Ely in Cambridgeshire.
Firefighters say a gas cylinder blew up on board the river cruiser.
The East of England air ambulance was called to the River Great Ouse.
The three people were taken to hospital with burns but their condition is unknown.
Emergency services sealed off the river area which is popular with tourists.
The East of England Ambulance Service say the injured people are a man and a woman in their forties and a child.
All were suffering from smoke inhalation and burns to their face and hands.
They were taken to Addenbrooke's Hospital in Cambridge.
Cambridgeshire Fire and Rescue Service was called out shortly before 9am.
One crew from Ely, three crews from Cambridge and one crew from Newmarket in Suffolk were called to the incident near Willow Walk in Ely.
Firefighters arrived to find a gas cylinder had exploded on a boat. Three casualties required treatment for burns and were taken to hospital by ambulance.
The crews ensure the area was safe and returned to their stations by 10.30am.
It was initially reported that four people were injured in the incident.