The crack in the Gotthard Road Tunnel that appeared on Sunday - leading to its closure - has been confirmed as caused by "redistribution of tension" within the rock above the structure.
Bern ruled out any reason linked to the ageing of the tunnel.
Part of the false ceiling had already suffered similar damage in 1985 - just five years after the tunnel opened.
Swiss Transport Minister Albert Rösti expects the tunnel to be open again by the end of the week at the latest.
Several injured in random knife attack
A man attacked several people with a knife yesterday afternoon in Zofingen in canton Aargau.
Push for Geneva to host song contest
Pressure is building to get canton Geneva to officially back the hosting of next year’s Eurovision Song Contest.
Govt says 'no' to song cash
As the potential cities vie for the right to host next years Eurovision Song Contest, the federal government have made it very clear – there will be no government money.
Unusual snowfalls on high passes
Despite being mid-May, the higher ground is getting a massive amount of snow.
Possible charge for Lauterbrunnen
The picturesque village of Lauterbrunnen in the Bernese Oberland is considering following the lead of Venice - and bringing in a daily charge for visitors.
Accident caused major disruption - man seriousy injured
Geneva rush hour traffic was severely disrupted yesterday afternoon after a 19-year-old scooter rider was hit by a tram in Rive.
