Three people have died after a suspected hantavirus outbreak on a cruise ship sailing in the Atlantic, while a British citizen has been taken to intensive care.

One case of hantavirus infection had been confirmed and there were five additional suspected cases, the World Health Organization said on Sunday.

The outbreak was reported on the MV Hondius, which was travelling between Argentina and Cape Verde. According to several online ship-tracking sites, the MV Hondius was just off the port of Praia, the capital of Cape Verde, on Sunday night.

Two of those who died were a husband and wife aged 70 and 69 from the Netherlands.

The South African health ministry said the man fell ill onboard the ship and died on the island of Saint Helena, while his wife died at a hospital in Kempton Park, a city in South Africa.

A British man, 69, who became ill on the ship was taken to a private health facility in Johannesburg, according to the South African health ministry, which said he tested positive for hantavirus.

Hantavirus is usually caught through contact with urine or faeces from infected rodents, but in rare cases can spread between people. It can lead to severe respiratory illness.

The ship is operated by the Dutch tour company Oceanwide Expeditions, which said on Sunday evening that two crew members onboard require urgent medical care and the third fatality was still onboard the ship.

The company said local health authorities had assessed the two symptomatic individuals, but the ship did not have authorisation from Cape Verdean authorities to disembark people requiring medical care.

“The priority of Oceanwide Expeditions is to ensure that the two symptomatic individuals onboard receive adequate and expedited medical care,” a spokesperson said.

“We are in close contact with those directly affected and their families and are providing support where possible.

“Disembarkation and medical screening of all guests require coordination with local health authorities, and we are in close consultation with them.”

Dutch authorities have agreed to lead a joint effort in organising the repatriation of the two symptomatic individuals to the Netherlands, the cruise operator said, along with the body of the deceased individual.

The WHO said it was “facilitating coordination” between national authorities and the ship’s operators to organise the medical evacuation of two passengers with symptoms.

The MV Hondius, which can accommodate about 170 passengers and has 70 crew members, is listed as a polar cruise ship on the websites of several travel agencies.

One of the cruises offers an itinerary departing from Ushuaia in Argentina and sailing to Cape Verde, with stops in the islands of South Georgia and Saint Helena.

The UK’s Foreign Office said: “We are closely monitoring reports of a potential hantavirus outbreak on the cruise ship Hondius and stand ready to support British nationals if needed. We are in touch with the cruise company and local authorities.”

With celebrities aplenty in ­attendance and a protester bursting on to the ­hallowed Crucible floor, at one stage on Sunday there threatened to be more ­headlines off the baize than on it during the opening half of snooker’s two-day extravaganza to crown its world champion.

But by Sunday evening and as the halfway point of the final between Shaun Murphy and Wu Yize approached, both ­competitors ensured all the talk will be about what is to follow on Monday afternoon and ­evening inside one of sport’s most famous buildings.

There is history to be made ­irrespective of who triumphs at some stage on Monday. If it is Murphy who claims his ­second world title, that would break the record for the longest gaps between world titles by some distance: ­Murphy’s maiden win was way back in 2005 when he was only 22.

But after Zhao Xintong’s ­historic victory last year burst open the boundaries of possibility for ­Chinese snooker, there is now the very ­realistic chance of back-to-back and ­different champions from China. Should Wu win, it would lean into a wider story of a younger generation of stars taking control of the baize.

He would be the fourth first-time winner in the past four years after Kyren Wilson, Luca Brecel and Zhao. With these narratives in mind, it is not unreasonable to question whether Monday provides a seminal moment for snooker’s direction.

Murphy perhaps symbolically represents the hopes of an older generation; only two men – Ronnie O’Sullivan and Mark Williams – have won the tournament in their 40s this century. Snooker is fast becoming a young man’s game and the ­emergence of Wu here has suggested most of the tidal wave of young talent continues to come from China.

The times may well be changing for good in snooker but there is a long way to go before we can be ­definitive on that count after a ­compelling opening day. The first eight frames in Sunday’s afternoon session were split equally; a good achievement for Wu given he was in action until almost midnight on Saturday in his dramatic victory over Mark Allen.

But there was no real slumber from 22-year-old Wu, who is attempting to win only his second ranking event after a triumph in the International Championship five months ago. He moved into a 3-0 lead, albeit not with the kind of glistening, error-free snooker he has produced on ­occasions over the past fortnight.

In the third of those frames a female spectator jumped the ­barriers and shouted out what many ­perceived to be comments about the TV licence fee. She was promptly stopped by the referee, Rob Spencer, whose ­experience as a police officer may well have come in handy in ensuring a swift end to the drama.

But that interruption came at the same time Murphy himself seemed to wake from his malaise. The ­Magician had been wasteful and sloppy inside the opening hour or so but breaks of 85, 98, 77 and 109 in the blink of an eye transformed what had ­threatened to be a nightmare opening session into one where he found himself 4-3 ahead.

Wu looked as though he was perhaps wilting, finally being affected by Saturday night’s late show in Sheffield. But just as he did on several occasions in the semi-final, he roared back from nowhere to claim the eighth and final frame of the afternoon session to level matters.

You felt with the early nerves shaken off, the evening session would be of a higher standard. And how Wu seemed to thrive. Chris Woakes, one of several sporting stars in ­attendance on Sunday alongside the likes of David ­Seaman, was among those applauding as Wu made a stunning 103 break as the youngster started with intent in the evening.

He would win three of the first four frames with the brand of snooker for which he has quickly become renowned: high-risk but in the same breath, fearless. Wu moved into an 8-5 lead with such swagger it was as if he were playing a ­practice match at his local club, not the ­biggest ­tournament of them all with the weight of a nation on his shoulders.

But Murphy is granite in these moments. He battled valiantly to make it 9-7 going into the final frame but crucially, Wu won the last frame of the day to go three ahead overnight. The first to 18 is crowned champion on Monday: have the coffee on standby, because this could be a late finish for the ages.