The Department of Foreign Affairs says around 170 Irish people may still be in Egypt, after it advised against all non-essential travel to the country.
"The number of Irish citizens in Egypt who have registered their contact details with the Department of Foreign Affairs and Trade is around 170. However, as registration is not compulsory, this figure does not reflect the total number of Irish citizens living in or visiting Egypt".
The department says it is "closely monitoring" the situation in Egypt though the Irish embassy in Cairo.
Any Irish citizens in Sharm el Sheikh in Egypt are being advised to exercise a high degree of caution and to avoid travelling outside the resort.
The Department of Foreign Affairs updated its travel information for Egypt, after the Irish Aviation Authority (IAA) directed all Irish airlines to avoid Sharm el Sheikh Airport and the airspace around the Sinai peninsula, until further notice.
224 died when a plane crashed in the Sinai desert on Saturday morning. The cause of the crash is still not known, but British experts now believe the plane could have been brought down by a bomb.
US intelligence agencies are also believed to have preliminary evidence a bomb was the cause of the crash.
An unnamed US official said intercepted communications have played a part in the tentative conclusion an Islamic State affiliate planted an explosive device.
Meanwhile, an IS propaganda video in Russian has appeared onine. It includes a direct threat to Russian President Vladamir Putin:
"This message is to you Putin pig. I would like to tell you that when you were sending your plane, people and equipment in order to destroy our State and us, you were mistaken deeply that you would not regret it and that your people would not regret it."
The Department of Foreign Affairs is also advising people who are planning to travel to Egypt to check with their tour operator or airline, as similar directions from other aviation authorities could affect scheduled flights.
Reporter Raf Sanchez of The Daily Telegraph spoke to Newstalk Breakfast.
CEO of the Irish Travel Agents Association, Pat Dawson, says Egypt is not a hugely popular holiday destination for Irish people at this time of the year.
Meanwhile, the British Prime Minister David Cameron says it may take some time to start flying the thousands of British tourists stranded in Sharm El Sheikh home.
