A spokesman for Trier-Fohren airfield, where a plane has crashed, said the jet was travelling from Shoreham airport in West Sussex and that all the deceased were German.
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"I saw a lot of smoke come out from the tail-end of the aircraft. I wondered if it was normal, whether it was just exhaust fumes."
The House of Commons Petitions Committee has said they will keep an eye on the petition and are concerned about fraudulent signatures.