A British barrister is in the hospital and four others have died after allegedly receiving free shots containing methanol while on vacation in Laos.

In Vang Vieng, 19-year-old Australian Bianca Jones perished after consuming tainted wine; two Danish ladies in their 20s and an American national are reportedly said to have perished.

According to The Times, at least 14 other tourists were hospitalized after taking the cocktails at the popular backpacker destination, including Simone White, a 28-year-old British barrister from Orpington in south-east London.

The victims, most of whom were guests at Nana Backpacker Hostel, fell ill after drinking the contaminated drinks on Tuesday last week. It is not known where the drinks were sold.

In a statement to parliament, Australia’s prime minister Anthony Albanese said Ms Jones had died after being evacuated from Laos for treatment in a Thai hospital. 

Her friend, also 19, remains hospitalised in Thailand.

"This is every parent's very worst fear and a nightmare that no one should have to endure," Mr Albanese said. "We also take this moment to say that we're thinking of Bianca's friend Holly Bowles who is fighting for her life."

In a statement to the Melbourne Herald Sun newspaper, Ms Jones' family asked for privacy in their grief.

"She was surrounded by love, and we are comforted by the knowledge that her incredible spirit touched so many lives during her time with us," the family wrote.

"We want to express our deepest gratitude for the overwhelming support, love, and prayers we've received from across Australia."

The US State Department confirmed that an American national was also thought to have died, but declined to provide further details.

Denmark's Foreign Ministry also confirmed on Wednesday that two of its citizens had died in Laos but would not provide further details.

Details on the alcohol poisoning began trickling out about a week after the two Australian women fell ill on November 13 following a night out drinking with a group in the party town.

Drinks tainted with methanol, which is sometimes used as the alcohol at disreputable bars, can cause severe poisoning or death.

Duong Duc Toan, manager of the Nana Backpacker Hostel, said more than 100 guests received free shots of Lao Tiger vodka mixed with ice and Coke Zero as a gesture of hospitality. 

He said the spirit was from a certified distributor and was not tainted by him or his staff.

He told the Associated Press: “Right now the police [are telling] every hostel and hotel and bar to stop selling drinks in Vang Vieng.”

He added to the Australian broadcaster ABC that he was certain the poisoned drinks were not sold at his bar.

He said: “The police in Vang Vieng and [the capital] Vientiane already came to the hostel to check, the shop [where] we buy the vodka, check the shop [where] we buy the whisky.

“We don’t do anything wrong, for sure. I really take care of all of the customers [who] stay with our hotel and our hostel.”

Laos police have opened a probe into the poisoning.