from the BBC:
http://www.bbc.co.uk/news/world-asia-18004097
9 May 2012 Last updated at 11:16 GMT
Russian passenger jet reported missing in Indonesia
This image shows a Superjet on a display flight in India in March
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A Russian Sukhoi Superjet 100 passenger plane with at least 44 people aboard has gone missing on a demonstration flight in Indonesia, reports say.
The plane disappeared from radar screens during a flight meant to last 30 minutes, a blogger with the Sukhoi delegation said.
Helicopters were dispatched to look for the jet, thought to have been flying near a mountain, Sergey Dolya said.
Emergency services confirmed a Sukhoi plane was missing.
Gagah Prakoso, spokesman for Indonesia's national search and rescue agency, said 46 people had been aboard the plane, which vanished from radar near Bogor, a city in West Java province.
"We are still looking for it and we are uncertain whether it crashed," he was quoted as saying by AFP news agency in the capital, Jakarta.
Dolya tweeted that there were 44 people aboard, eight of them Russians.
'Guests aboard'
The plane took off from east Jakarta's Halim Perdanakusuma airport, which is used for some commercial and military flights, at 14:00 (07:00 GMT), the Indonesian search and rescue agency spokesman said.
"At 14:50 it dropped from 10,000ft [3,000m] to 6,000ft," the agency told AFP.
Herry Bakti, head of the transport ministry's aviation division, said the aircraft had been on the second of two demonstration flights, and those on board were invited guests.
The Russian embassy in Jakarta said in a statement earlier this week that a Sukhoi Superjet 100 demonstration would take place in Jakarta on Wednesday, AFP added.
The embassy could not be immediately reached for comment.
The Superjet, a mid-range airliner that can carry up to 100 people, is military plane-maker Sukhoi's first commercial aviation plane.
It was created by a joint venture, majority-owned by Sukhoi, with Italy's Finmeccanica and a number of other foreign and Russian firms also involved.