I am afraid it might be more than a rumour. According to the biggest daily paper "Helsingin Sanomat", (and several less worthy tabloids) yesterday the Captain of a cargo aircraft was breathalysed by the Police at HEL. The paper did not specify the airline in question.
Breathalysing, as far as I know, is not a standard procedure in Helsinki, but in this case the police was notified of the Captain's condition and an alcohol level of 0.8 o/oo was measured at the scene. This figure will be verified by laboratory tests, according to the paper.
I am sure the CAA / investigating authorities will file a report on the incident in due time.
-headwind