A 34-year-old woman has died and two girls are in a serious condition a day after being attacked on a Swiss train by a man armed with a knife and flammable fluid, police said.
The suspected attacker also died of his injuries, police said.
The girls, aged 6 and 17-years-old are in serious condition.
Five people were stabbed or burned during the attack by a 27-year-old Swiss man on the train nearing the Salez station on a trip between Buchs and Sennwald in St Gallen.
"The motive remains unclear," police said in a statement. "There is currently none that can be found."
Seven people have suffered burn and knife wounds in an attack on a Swiss train, according to St Gallen police.
The suspected attacker, described as a 27-year-old Swiss man, reportedly set fire to a train in northeastern Switzerland after igniting a flammable liquid.
He then attacked passengers with a knife. A six-year-old child was among the injured, along with three women and two men.
A police spokesman said the possibility of a crime of passion is not being excluded, but ruled out terrorism as "very, very far-fetched".
The suspect was taken to hospital and a major police operation is underway.
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Albania beat Romania 1-0 to take third place in Group A, but face a wait to see if their tally of three points—and minus two goal difference—is enough to progress to the knock-outs. Switzerland and France drew 0-0 in the other game to seal their own progression, with the hosts taking top spot.
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Voters in Switzerland have rejected a proposal to introduce a guaranteed basic income for all citizens, with around 78% voting against, projections by the GFS polling group for Swiss broadcaster SRF showed.
Supporters had said introducing a monthly income of 2,500 Swiss francs (£1,755) per adult and 625 francs per child under 18 would promote human dignity and public service at a time of increasing automation.
Opponents, including the government, said it would cost too much and weaken the economy.
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Swiss voters have rejected a right-wing proposal for the automatic deportation of foreign law-breakers, a defeat for the country's dominant anti-immigration Swiss People's Party (SVP).
The SVP proposal was to expel foreign residents guilty of anything from murder to speeding, but it was voted down in a referendum on Sunday.
Activists and business leaders said it would violate human rights and complicate relations with Switzerland's main trading partner, the EU, which is already unhappy with a 2014 vote that backed quotas on EU workers.
The final tally showed 58.9% of voters opposed automatic deportations, with a turnout of more than 62%.