The Irish Aviation Authority has told Irish airline operators not to operate to or from Sharm el Sheikh Airport, Egypt or in the Egyptian Sinai Peninsula airspace, until further notice.
The IAA says this precautionary measure was taken in line with information released by the UK earlier today.
The British Government released a statement saying that it is looking into the possibility that the plane which crashed in Egypt at the weekend "may well have been brought down by an explosive device".
All flights from Sharm el-Sheikh bound for the UK have been suspended while security measures at the airport there are assessed.
Former MI6 director Sir Nigel Inkster, says there has been much debate about what caused the crash.
"The local terrorist movement, the Islamic State, really does not have the capabilities to launch a missile that would hit a plane that high, so if it was an explosive device it must have been an explosive device that was deliberately placed on the plane prior to take-off."