Jakarta , Indonesia ( CNN ) -- The wreckage of a Russian passenger airliner that went missing during a demonstration flight over Indonesia has been found in a mountainous area , a local official said Thursday . Ali Umri Lubis , the mayor of Bogor , in West Java , said that parts of the Sukhoi Superjet 100 that disappeared off radar screens on Wednesday had been located . But he did n't provide any information on the passengers who were on board . Rescue workers on the ground who have been searching for the plane have not yet been able to reach the wreckage . President Susilo Bambang Yudhoyono of Indonesia said in a brief televised address Thursday that there was a strong possibility that the plane had crashed into Mount Salak , a volcano south of Jakarta . The Sukhoi jet , Russia 's newest civilian airliner , was carrying 42 passengers and eight Russian crew members , according to Sunaryo , an official with Sukhoi 's Indonesian agent , Trimarga Rekatama . However , the number was in dispute . The Indonesian National Search and Rescue Agency said only 37 of the 42 invited passengers were on board . Russian state-run news agencies reported 44 people were on the plane . The plane was on its second demonstration flight Wednesday when it lost contact with air controllers at Jakarta 's Halim Perdanakusuma Airport . `` The first demonstration flight in the morning went smoothly , '' said Sunaryo , who uses only one name . `` There were no problems . '' On the second flight , the plane began making its descent but vanished from radar screens at 6,200 feet in a mountainous area . The plane lost contact with air traffic controllers at 2:12 p.m. , 21 minutes after taking off , said Marsda Daryatmo , head of the search and rescue agency . Two helicopters were immediately sent out to search for the plane but had to return to their bases due to strong winds and unpredictable weather . The Sukhoi jet arrived in Jakarta as part of a demonstration tour of six Asian countries . It had been to Myanmar , Pakistan and Kazakhstan , and was due to visit Laos and Vietnam after Indonesia , said the Russian news agency RIA Novosti . Sukhoi manufactures military aircraft and is known especially for its fighter jets . Its civilian aircraft is narrow-bodied with a dual-class cabin that can transport 100 passengers over regional routes . It flew its maiden flight in 2008 . In March , a Superjet 100 operated by Russia 's Aeroflot Airlines was forced to abandon its flight to Astrakhan , Russia , and return to Moscow because of problems with the undercarriage , according to RIA Novosti . A similar defect in another Aeroflot-operated Superjet 100 plane had to be fixed in Minsk in December . Russia 's state-run United Aircraft Corp. said the defect did not affect passenger safety . CNN 's Kathy Quiano contributed to this report .
NEW : Wreckage of the plane has been located , a local official says . The Sukhoi Superjet 100 was on a multination demonstration tour . The plane started to descend and then vanished off radar screens . A Sukhoi representative says 42 passengers and eight crew members were on board .