A man and woman found dead in a swimming pool at a country hotel both drowned, police said.
The bodies of the pair, a man in his early 30s and a woman in her early 20s from the London area, were discovered at the Down Hall Country House Hotel in Hatfield Heath, Essex, on Saturday evening.
Essex Police said that a provisional post-mortem examination found that their deaths were consistent with drowning.
A spokesman added: "Detectives are continuing to investigate the circumstances leading up to their deaths but are treating them as non-suspicious. Further routine tests will be undertaken and a report will be prepared for the HM Coroner's inquest hearing."
The couple will not be identified until the inquest into their deaths is opened, he added.
Staff dived into the pool try to save them after they were found at 7.35pm, but their efforts were in vain.
Police are focusing on the relationship between the victims as part of their investigation.
Hotel staff were distraught at the incident, manager Chris Falcus said, adding: "We are devastated by this tragic incident and our thoughts are with the families and friends of those concerned.
"As soon as the alarm was raised, two of our team dived into the pool and did everything they could to try to save them. We are co-operating fully with the police investigation."
A number of functions were taking place at the hotel, including weddings, birthday parties, christenings and a murder mystery event.