By Nelson Alcantara LOS ANGELES/MOSCOW (eTurbo News) -- Two airlines that departed from Moscow?s Domodedovo airport have crashed within minutes of each and shortly after disappearing from the radar screen on Tuesday, killing all passengers and crew aboard. While there are conflicting reports on the details of the crashes, authorities have identified the crashed airlines as Volga-Aviaexpress Tu-134 and Siberia Tu-154. Both left the airport within 40 minutes of each other and simultaneously got into trouble at around 11:00 p.m. on Tuesday, raising suspicions that terrorists may have orchestrated the attacks. Three minutes after the Volga-Aviaexpress Tu-134 crashed, air traffic controllers lost contact with the Siberia Airlines Tu-154, Reuters reported. Wreckage of Volga Aviaexpress? Tu-134 airliner, which carried 35 passengers and seven crew member, has been found in the Tula region, about 125 miles south of Moscow. The company released a statement claiming that all necessary security checks had been completed, and that the flight was being piloted by the Volga-Aviaexpress director, Yury Baichkin. A Russian aviation source, who asked not to be identified, said the Volga Aviaexpress flight sent a hijack alarm 10 minutes before it disappeared from the radar. The airline is yet to issue an official statement whether a distress alarm was sent. According to the Emergency Situations Ministry, no one survived in the Volga Aviaexpress flight crash. Meanwhile, Siberia Airlines has confirmed that its flight 1047 bound from Moscow to Sochi, which disappeared from radar screens over the Rostov region some 600 miles south of Moscow at approximately 11:00 p.m. on Tuesday, is the same Tu-154 plane whose wreckage has been found near the southern Russian city of Rostov-on-Don. ?Despite the fact that details are not clear at the moment, we can confirm that there were 46 people, including eight crew members on board the aircraft,? Siberia Airlines said in a statement. When asked if he had any knowledge of tourists being on the flight, Siberia Airlines spokesperson Iliya Novohatskij, speaking exclusively to eTurbo News, said, ?It appears there are no foreign names, but we are not sure at this time.? There are conflicting reports whether the crashed Siberia Airline plane had sent any distress signal or not. Eyewitnesses claim that the aircraft exploded in the air before it crashed. Air traffic controllers reportedly said no distress signals were received from the crew before the crash, the Associated Press reported. On the other hand, Interfax news agency reported quoting an unnamed Russian official source saying the signal was an SOS and no other signals were sent. Siberia Airlines spokesperson Iliya Novohatskij did not comment whether or not the downed airliner sent any distress signal. Siberia said the Tu-154 liner had its last date of ?heavy? maintenance in August 1993. The Tu-154 plane recently underwent maintenance this month, Siberia said. With concerns the crashes may be related to terrorism, the US Homeland Security said it is monitoring the situation, while a senior US State Department official stated, "We are obviously concerned by the news. We're following developments closely and trying to determine the facts." "The fact that both planes took off from one airport and disappeared from radars around the same time can show it was a planned action," said one aviation source quoted by Interfax news agency. President Vladimir Putin ordered the Federal Security Service, the nation's top intelligence agency, to conduct an investigation and at the same time tightened security at airports across the country. Moscow has been battling Chechen separatists for ten years. Just last week, rebels promised more attacks after launching a major raid in the local capital Grozny. However, Chechen separatists have denied any role in the two plane crashes. Farouq Tubulat, a spokesman for Chechen separatist leader Aslan Maskhadov, told Al Jazeera television, "Our government has nothing to do with terrorist attacks. Our attacks only target the military. This is part of the Russian propaganda plan to besmirch the struggle of the Chechen people.? (with wire inputs) _______________________________ Do you Yahoo!? Win 1 of 4,000 free domain names from Yahoo! Enter now. http://promotions.yahoo.com/goldrush