The British government issued a travel warning for Egypt on Saturday, citing a "heightened risk of terrorism against aviation" when British Airways and the German airline Lufthansa suspended flights to Cairo as a precautionary measure.
British Airways flights were suspended for seven days, while Lufthansa flights resumed on Sunday.
"There is an increased risk of terrorism against aviation," a statement by the British Foreign and Commonwealth Office said. "Additional security is available for flights from Egypt to the UK and you should work closely with airport security officers."
British Airways and Lufthansa ̵
"As safety has top priority for Lufthansa, the airline has temporarily suspended its flights to Cairo today as a precautionary measure while further assessments are being made," Lufthansa said in a statement. We currently have no additional information.
In a separate statement, British Airways said: "We are constantly reviewing our security arrangements at all our airports around the world and have suspended flights to Cairo for seven days to allow further evaluation. "
Two sources of security who were informed of the situation told ABC News that No A specific threat has been identified, but airlines are responding to continuing concerns about security issues at Cairo Airport, and suspension of flights will be a possibility for airlines to verify the situation, the sources said.
The US government does not intend to issue a directive, while individual US carriers monitor the situation and are in contact with other carriers and security agencies.
BA customers with tickets were surprised on Saturday at London's Heathrow Airport when suddenly they received word that their flights would not start.
"Currently in the process of boarding a @British_Airways flight to Cairo, which will be canceled, not for one day, not for two days, but for seven, security risk, someone knows something we do not know." handle @shanghai_dan.
The UK Foreign Office also warned against "all travel to North Sinai governorate due to ongoing criminal activity and terrorist attacks on police and security forces that led to death," the agency said.