The Pfizer/BioNTech vaccine has been authorised for use in Switzerland following a two-month rolling review, the Swissmedic regulatory authority said Saturday.

Switzerland's armed forces said Saturday that the army is prepared to deploy to help in the battle against the COVID-19 pandemic, which has infected more tha 1,000 people in the country.

Six people, including children, died when a fire broke out in an apartment building in the northwestern Swiss town of Solothurn overnight, local police said Monday.

Swiss voters on Sunday approved a measure to make it easier for third-generation immigrants to become citizens, crushing rightwing nationalists who had stoked fears about granting nationality to more Muslims.

Swiss police said Sunday there was no indication a stabbing and fire attack on a passenger train was an act of terror, as a female victim and the assailant died of their injuries.

Five other people were hurt in Saturday's assault in eastern Switzerland, including a six-year-old girl who was seriously injured.

As Denmark faces a barrage of criticism over its controversial plan to seize refugees' valuables, Switzerland has already been doing so for years, Swiss authorities said Friday.

Swiss asylum law has since the 1990s required asylum seekers to contribute to the costs of hosting them in the wealthy Alpine country.

Geneva remained on high alert Friday as police carried out further searches in the western Swiss city for several suspected jihadists believed to have links to the Islamic State (IS) group, officials said.

Geneva, which borders France and is home to the U.N.'s European headquarters, ratcheted up its security Thursday after receiving information from the Swiss government about suspicious individuals in the area.

Switzerland has active criminal proceedings against 33 individuals over suspected ties to extremist Islamist groups, but only three people are currently in custody, the attorney general's office said Sunday.

Some of those cases have been opened in the last two to three months, but the most serious involves a cell of possible Islamist radicals uncovered in the Canton of Schaffhausen last year, said Andry Marty, a spokesman for Swiss Attorney General Michael Lauber.

Swiss voters swung to the right in parliamentary elections on Sunday dominated by concerns over Europe's migrant crisis, with the country's largest party winning a record number of seats.

The populist Swiss People's Party (SVP), known for its virulent campaigns against immigration, the European Union and Islam, won 65 of the 200 seats in the lower house, up from the current 54, and saw its support rise to its highest-ever level.

"We should be helping our own people before giving them handouts," says Gianpaolo Ferrari, glancing towards the African men clustered around Chiasso's main square.

The 58-year-old restaurant worker in this small southern Swiss town on the Italian border echoes sentiments held by many here and across Switzerland, where migrants and asylum policies top the concerns of voters ahead of Sunday's parliamentary elections.