Norways' rail operator Bane Nor has been forced to close the high profile Blixtunnel on the country's recently opened highspeed Follo railway following an incident caused by leaking alkaline water.

https://www.newcivilengineer.com/latest/alkaline-water-leak-leading-to-smoking-cable-the-latest-in-slew-of-incidents-for-nordic-countries-longest-rail-tunnel-02-06-2023/