Russia's transport oversight agency is calling on the country's airlines to stop using the Tu-154 plane until the cause of a passenger jet fire and explosion that killed three people is determined, as AP reported. The proposal was made Sunday, one day after the jet caught on fire as it taxied for takeoff at the airport in the Siberian city of Surgut. No cause has been determined for the fire, which also injured 43 others. Investigators have found the plane's flight recorders and have taken fuel samples and documents from the regional airline that used the plane. It was not immediately clear if the call to stop using the planes was binding. The Tu-154 is in wide use on Russia's internal air routes. It was the workhorse of the Soviet and post-Soviet civilian aviation industry.