A plane flying from Warsaw to the Egyptian resort of Hurghada has made an emergency landing in Bulgaria following a bomb threat, Bulgarian authorities said.
The flight, carrying 161 people, made an emergency landing in the Black Sea city of Burgas.
A spokeswoman for the Burgas airport said all passengers and crew were evacuated, but no explosives have been found aboard.
The plane landed in Burgas at 05.48 a.m. (0348 GMT) after a request for flight number LLP8015 travelling from Warsaw to Hurghada to make an emergency landing, due to a report of the presence of explosives on board
A police spokeswoman said crew were alerted to a possible bomb by a passenger, who when questioned, admitted to having consumed alcohol.
Polish national carrier LOT said the aircraft did not belong to the airline but was a charter, destined for the Egyptian city of Hurghada.
The airport remains closed.
Neither Egypt nor Russia has accepted an offer of help from the FBI to investigate the crash of Metrojet flight 9268 at the end of last month.
The plane crashed in Egypt's Sinai peninsula on 31st October shortly after takeoff.
FBI spokesman Joshua Campbell said the bureau had offered "forensic assistance" and other unspecified services to both Russia and Egypt.
The White House says the United States has not made its own determination on the cause of a Russian plane crash in Egypt, but says "some information has been learned" that supports British suspicions that a bomb was involved.
"The United States has not made our own determination about the cause of the incident, however we can't rule anything out, including the possibility of terrorist involvement," White House spokesman Josh Earnest said.
Earnest was asked by a reporter why there was "a big disconnect" between David Cameron's comments that a bomb was likely to have brought down the plane and the US position.
He responded by saying his briefing from intelligence agents did not include that but added "we have enough information to not rule out terrorism."
The comments come after Prime Minister David Cameron said earlier on Thursday it was increasingly likely that a bomb brought down the plane, killing all 224 passengers and crew.
Activists are blocking the entrance to No 10 in protest at the visit of Egyptian President Abdel Fatah al-Sisi who is due to hold talks with David Cameron later today.
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A Russian passenger jet which reportedly went 'missing' with more than 200 people on board may have crashed in Egypt, according to officials.
The Airbus A-321 jet, which was travelling from Egypt to Russia disappeared from radar screens whilst in Cypriot airspace, according to Russia's RIA news agency.
A statement released by the Egyptian Prime Minister's office confirmed that a Russian passenger plane had crashed in central Sinai.
Egyptians living abroad have begun voting in the nation's first parliamentary election since the military's 2013 ousting of Egypt's first freely elected president.
Voting began on Saturday and will continue on Sunday, the first of two days of voting in 15 provinces, including Cairo's twin city of Giza. Voting in Egypt's 13 other provinces will be on November 22-23.
Many analysts and observers expect a low turnout and a chamber that will support the policies of general-turned-president Abdel-Fattah el-Sissi who was elected in 2014 after the ousting of Mohamed Morsi.
Some 300,000 police and soldiers are deployed to ensure the security of the vote.
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Al-Jazeera journalist Peter Greste was visibly emotional as he learned one of his colleagues was to be freed.
Greste was filming an Australian comedy show when he discovered colleague Mohamed Fahmy had been pardoned in Egypt.
Egyptian authorities released the Canadian journalist and his Egyptian colleague Baher Mohammed on Wednesday after a presidential pardon.
Greste was sentenced in absentia, along with Fahmy and Mohammed, for airing what a court described as "false news" and biased coverage.