'You want upgrade to Biff Class, comrade?'

Two crew members on a domestic Aeroflot flight beat up a passenger who had complained that the flight attendants were drunk, airline spokeswoman Irina Dannenberg said on Tuesday.

The passenger, identified only as A. Chernopup, was aboard a recent flight from Moscow to the Siberian city of Nizhnevartovsk, Ms Dannenberg said, adding that the crew belonged to another airline, Aviaenergo.

Seeing that the crew were intoxicated and were not fulfilling their duties, Mr Chernopup asked to be served by a sober and competent flight attendant, Ms Dannenberg said.

He was then beaten up by two crew members.