Scottish ferry owner CalMac is investigating five seafarers after allegations that they failed breath tests.
Local media said the 659-passenger Isle of Arran (built 1984) was pulled from its route from Islay to the mainland on Tuesday as passengers were waiting to board.
One passenger reported seeing someone taking a breathalyser on to the vessel, the Press and Journal daily reported.
CalMac said: “We can confirm Isle of Arran was taken out of service on Tuesday March 7 due to an HR matter concerning a number of individuals.
"Formal
