Officers investigating the Windermere boat deaths will look closely at the vessel's generator, Detective Inspector Mike Brown, of Cumbria Police, said today.
He also told reporters there were issues with the aftermarket generator that were "clearly evident".
A mother and daughter who died from suspected "gas poisoning" on a boat in the Lake District have been named as 36-year-old Kelly Webster and 10-year-old Lauren Thornton.
A man who was also on the boat was taken to hospital, but has been released in the last couple of hours.
Investigators are trying to establish if a faulty generator may have been responsible.
A 39-year-old man who was taken to hospital for treatment after falling ill on a boat in Windermere, has been released.
Matthew Eteson, from Leyland, was on the boat with Kelly Webster and Lauren Thornton, who both died from what police say was 'suspected gas poisoning'.
An eyewitness has praised the professionalism of the emergency services in responding to the Lake Windermere boat tragedy, which claimed the lives of Kelly Webster, 36, and her 10-year-old daughter Lauren Thornton.
Cumbria Police have released a statement naming the two people who died on a boat on Windermere as Kelly Webster, aged 36 from Leyland and her 10 year old daughter, Lauren Thornton.
Police say they are not treating the deaths as suspicious.
Police are able to confirm the two people who died yesterday (1st April 2013) at Lake Windermere were Kelly Webster, aged 36 from Leyland and her 10 year old daughter, Lauren Thornton.
Cumbria Police were alerted to Lake Windermere by the Ambulance service after it was reported that three people on a privately owned boat were having serious breathing difficulties.
On arrival, Mrs Webster and her daughter, Lauren, were being treated by paramedics and were air lifted to Royal Lancaster Infirmary, where they tragically died.
A man, aged 39 from Leyland, was also on the boat remains in Royal Lancaster Infirmary receiving treatment.
Police are not treating the death as suspicious, and it is suspected that the death was caused by some form of gas poisoning. Enquiries continue to be conducted by officers on behalf of the coroner.
Police have named the two people who died on a boat on Windermere as Kelly Webster, aged 36 from Leyland and her 10 year old daughter, Lauren Thornton.
A woman and a young girl have died and a man was seriously ill after suffering breathing difficulties on a private boat at Lake Windermere in the Lake District yesterday.
A 36-year-old woman and a 10-year-old girl, both from the Leyland area of Lancashire, were treated at the scene and then air-lifted to Royal Lancaster Infirmary, where both have since died.
The man, who was also on the boat, is still receiving treatment at the Royal Lancaster Infirmary, Cumbria Police said.
The deaths of a 36-year-old woman and a 10-year-old girl in Windermere may have been caused by a faulty boat generator, The Telegraph reported.
Tony Rothwell, who manages Bowness Bay marina, said lake wardens told him that the victims' boat had been fitted with a faulty generator, which was connected to a fan heater.
Mr Rothwell said: "It was an amateur job, the boat had been fitted with a generator and the exhaust has leaked. It had been a very cold day and the fan heater was connected to the generator. It is a terrible tragedy."
A woman and a young girl have died after suffering breathing difficulties on a boat.Read the full story ›
The unfolding incident, at a jetty near Bowness, was witnessed by businessman and television personality Duncan Bannatyne who remarked on the police and ambulance activity to his followers on Twitter.
The Dragon's Den star later posted a photograph of the scene, saying: "Tragic accident over there I am afraid."