Police in Glarus launched a major operation after a briefcase was left abandoned on the street for several hours.
Roads were closed and traffic diverted as a robot brought in from Zurich was used to open the suspicious case.
In all around 30 officers were involved – as well as fire crews and paramedics.
The case was found to be empty.
Police now want to track down its owner.
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This winter was significantly warmer than average
