- 12 updates
Police in St Lucia say they have arrested two further people in connection with the murder of Roger Pratt, a British tourist who was travelling around the world with his wife.
Five people remain in custody and are assisting police with their inquiries.
The widow of a British man killed in St Lucia has said she never felt unsafe in the country until the events of "those final tragic minutes".
Roger Pratt, 62, was killed as three armed men climbed aboard their yacht moored off the coast of St Lucia on Friday.
Margaret Pratt said local people had demonstrated great kindness towards her as the investigation into her husband's death continued, during an interview with local media.
The Royal Norfolk and Suffolk Yacht club, where Roger Pratt was a member, have released a statement following his death in St Lucia.
They said 'the club was stunned to hear of the tragic death of Roger Pratt on his boat the Magnetic Attraction.
The commodore of the club sends his sincere condolences to Mrs Pratt and the family at this time.'
The club's flag is today flying at half mast.
The sister of a British woman who was injured and her husband killed after three men boarded their boat in the Caribbean has said the family are "totally shocked and shattered".
Margaret and Richard Pratt had planned to set sail for the next stage of their journey the day before the attack off the south coast of St Lucia on Friday.
Jenny Riley, Mrs Pratt's sister, told the Daily Mail: "They had gained deep sea sailing experience by cruising extensively on the south coast and around Europe. To sail across the Atlantic and explore the Caribbean was Roger's dream.
"They were both experienced sailors and had sailed dinghies and keel boats since they were children. It is a tragic, shattering end to their dream."
Mrs Riley also said her sister was discharged from hospital last night and has returned to the couple's yacht.
Authorities in the Caribbean island of St Lucia said they have arrested three people today in connection with the murder of a British tourist who was traveling around the world with his wife.
The victim, Roger Pratt, 62, was on a trip with his wife, Margaret, ahead of her 60th birthday when their boat was boarded by three unidentified attackers on Friday, police said. Margaret Pratt was also treated for injuries.
The murder has raised concerns on the small, eastern Caribbean island, where tourism accounts for about two-thirds of the economy.
The British couple who were attacked in their boat in St Lucia, leaving one dead and the other injured, had planned to leave the Caribbean island a day before the incident took place.
Margaret Pratt wrote on her blog in the hours before the attack of how bureaucracy had thwarted their attempts to leave that part of the Caribbean.
She wrote in her blog: "On Thursday morning the plan was to clear out from Soufriere, then to travel south and use up the 72 hours before we had to be away.
"But bureaucracy intervened. HM Customs and Excise in Soufriere told us that exit had to happen within 24 hours of clearing out; and that anyway, we couldn't clear out of Soufriere that day because the Immigration Officer hadn't come to work(!!)
"So here we are in Vieux Fort, the most southerly port of clearance in St Lucia. It's very different. There's a port; an airport and no tourists - and so it's a regular town."
Roger Pratt, 62, from Warwickshire, died while defending his wife Margaret, who is being treated in hospital after the attack.
The British woman whose husband was killed when their boat was targeted by attackers in the Caribbean had written a blog post about a delay to the couple's travels hours before the incident.
Margaret Pratt, who was celebrating her 60th birthday during the round-the-world sailing trip, wrote about how she and her husband Roger had been held up leaving the island of St Lucia by immigration checks.
The couple who were attacked in the Caribbean were attacked while their boat was moored off the Vieux Fort coast where they had been staying as part of the round-the-world voyage, celebrating Mrs Pratt's 60th birthday.
The couple left Lowestoft in June, navigating the English coastline before heading to the Algarve and on to the Caribbean.
Writing on her LinkedIn profile before she left, Mrs Pratt said: "Off travelling! The plan is to be in the Caribbean for my 60th birthday in January 2014... all a bit of a leap into the unknown. Please stay in touch - I plan to be an assiduous correspondent!"
The couple lived in the village of Moreton Morrell before embarking on their adventure.
At least two people are being held by police on the Caribbean island of St Lucia after a Briton was killed while defending his wife.
A St Lucian police spokesman confirmed Mr Pratt died trying to defend his wife from attackers, but said there was no evidence the man was shot.
Roger Pratt, 62, from Warwickshire died when he was attacked on his boat yesterday - just hours after the couple's plan to leave was thwarted by officials. Mr Pratt's wife, Margaret, is being treated in hospital after the attack.
A British man killed in St Lucia after an attack on a boat moored of the island's south coast has been named by Caribbean authorities as Roger Pratt.