The maritime police continued the search on Saturday, as the Bernese canton police announced in the short message service Twitter.
On Friday, emergency services looked for the missing person in a large-scale operation from water, land and air. The banks of the Aare and Zulg in the Thun-Steffisburg area are popular local recreation areas.
The 23-kilometer-long Zulg has its source in the region between Hogant and Sigriswilergrat. During the summer months, especially during thunderstorms, floods on the Zulg occur again and again. The river then carries a lot of debris with it.