NEW : They are : the airport service chief engineer , Vladimir Ledenev , who 's in charge of snow-clearing operations ; flights director Roman Dunayev ; air traffic controller Svetlana Krivsun ; and the airport 's chief air traffic controller , Alexander Kruglov . ` Judge orders snowplow driver involved in crash to be held in pretrial detention . Director general of the airport and his deputy resign from their posts . three other people are detained over a crash that killed the head of a Russian oil firm . Total CEO Karabanov and Four others were killed in the crash in London .
NEW : Judge orders snowplow driver involved in crash to be held in pretrial detention . Director general of the airport and his deputy resign from their posts . three other people are detained over a crash that killed the head of a Russian oil firm . Total CEO Karabanov and Four others were killed in the crash in London .