Since starting this thread, I also tried different route to obtain some info. Bellow is info received from Swedish ALPA which was confirmed in telephone call with Swedish CAA.
"Alcohol testing of air crew on duty (pilots and cabin crew) can be made in Swedish Airports on a random basis. It will be performed by police officers, in uniform or plain clothes as a “Breathalyzer check”.
It will in this case be performed prior to or after flight, either on board or in direct connection with crew boarding/disembarking the aircraft. It shall never be performed in front of passengers.
No reports / paperwork required if the test is negative. If, however, the test is positive the pilot or cabin attendant will be escorted to perform a so called “evidence test” with higher accuracy, either via a blood sample or breathalyzer. The limit is 0,02% alcohol in blood."