Turkish Airlines announced on its website on Tuesday that the scheduled flights between Istanbul and Egyptian city Sharm el-Sheikh have been cancelled until Jan. 1. Turkish Airlines cited security issues as the reason for the cancellations.On Nov. 19, the Turkish Foreign Ministry issued a travel warning to Sharm el-Sheikh in Egypt's Sinai Peninsula, "Citizens should consider risks in the region when planning their visit to Sharm el-Sheikh," the ministry said in a statement.The ministry also said that some airlines had already cancelled their flights to Egypt's Sinai Peninsula.Terrorist group Daesh claimed responsibility for a suspected bomb attack on a Russian passenger plane that crashed in Egypt's Sinai Peninsula after taking off from Sharm el-Sheikh on Oct. 31, killing all 224 people on board.