A Swiss air force commander has issued an apology after his aerial display team conducted a fly-by over the wrong event.
The air force team were scheduled to carry out a fly-by over the municipality of Langenbruck over the weekend, where an event was ongoing to mark the centenary of the death of Swiss aviation pioneer Oskar Bider.
But the group flew instead over Mümliswil, an area 6.5-kilometres east of their intended target, interrupting a local yodelling festival.
Switzerland's Defence Ministry said the fly-by hadn't been practised beforehand, and the team were further hindered by a distraction from a helicopter.
The jets were also not fitted with GPS devices, the ministry added.