Tests are being carried out on food, water and air conditioning at a hotel in Egypt where a British couple died as authorities try to establish what caused their death.
John and Susan Cooper, from Burnley, Lancashire, died while staying at the Steigenberger Aqua Magic Hotel in the Red Sea resort of Hurghada.
Their daughter Kelly Ormerod has voiced concerned that there is “something suspicious” about their deaths.
Confirming that tests are being carried out on food, hygienic systems, water and air conditioning systems at the hotel, the chief executive of Thomas Cook has promised he will do everything to “get to the bottom of it”.
Peter Fankhauser told Sky News: “We have no real evidence what caused the deaths, but what I can promise is at Thomas Cook we are doing everything to support the family and to support the Egyptian authorities… to get to the bottom of it and to get to the cause.”
He said: “Twenty-four hours after the couple died, we had our specialists… in the hotel. They took probes of the food, of the hygienic systems, of water, as well as the air conditioning systems, and all those probes are now in Egypt. They are now examining and testing the probes and we support them in doing that, but that takes about 10 days.”
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Mr Fankhauser said Thomas Cook decided to move 300 guests out of the hotel 24 hours later as a precaution after becoming aware of an “increased number” of illnesses.
He confirmed that 13 customers had food poisoning but were not in a serious condition.
Mr Cooper, 69, died in his room while his wife, 63, a Thomas Cook employee, died after being taken to hospital, according to Mrs Ormerod.
She said they were “fit and healthy” before their holiday and in “perfect health” just hours before being taken ill.
An inspection of the Coopers’ room showed there were no toxic or harmful gas emissions or leaks, according to a statement by prosecutor Nabil Sadeq on Saturday.
It also said his office was waiting for a forensic analysis of samples taken from the bodies.