The Defence Forces deployment to Chad due tonight has been delayed again.
The Chad airport where they were due to land has been closed because of rebel troop movement near the capital, N'Djamena.
All deployment of EU troops has been delayed as of 6.30pm tonight.
There are already eight Irish military personnel in Chad. Three are there as part of EUFOR Chad/CAR Force HQ and five are an advance party of the Army Ranger Wing.
At present there is no threat to their security and they are in regular contact. They are keeping Defence Forces HQ and the mission's Operational HQ in Paris updated.
The situation will continue to be monitored closely.
'Obviously we will take whatever action necessary to ensure safety of our personnel,' a spokesperson for the Defense Forces said.
'The current tensions are a matter for the Chadian authorities. It does not fall within the remit of the UN-mandated mission, which is focused on the protection of refugees and internally displaced persons in eastern Chad.'
About 50 members of the elite Army Ranger wing were due to fly to Central Africa tonight in the build-up to the start of the EU peace enforcement mission in Chad.
The rangers, along with army engineers, will be based in Abeche, the headquarters of the EU force.
Their job will be to set up camp and help create a safe working zone for the main body of 350 Irish troops who will be deployed to Chad in mid-March.
This large group of Irish soldiers will be based in Goz Beida and their mission is to protect both refugees from neighbouring Darfur and camp workers.
Last night, the transportation of army equipment began at Dublin airport.
The first of four huge Russian Antinov cargo flights was loaded with 300 tonnes of gear for the rangers. Included are 18 military vehicles, weapons, ammunition, water and medical supplies.
