The Austrian Airlines flight made an emergency landing in Sofia on Sunday, October 18, escorted by a Bulgarian MiG-29 fighter jet. The Bulgarian air force scrambled a MiG-29 fighter jet to escort the airliner as part of established procedures, says the Transport Ministry Key points and original sources are listed below.

• The Austrian Airlines flight made an emergency landing in Sofia on Sunday, October 18, escorted by a Bulgarian MiG-29 fighter jet.S1

• The Bulgarian air force scrambled a MiG-29 fighter jet to escort the airliner as part of established procedures, says the Transport MinistryS2

• Last week, two anonymous reports of bombs on Delta flights from New York to Israel were received, but both proved to be false.S3

• The plane reportedly landed in Bulgaria after an emergency was declared on boardS4

• A flight from Tel Aviv, Israel, made an emergency landing Sunday evening in the Bulgarian capital of Sofia after a bomb threat, Bulgarian state television reported.S5

• A flight from Tel Aviv has made an emergency landing in Bulgaria after a bomb threat.S6