Unconfirmed sources claim there is fierce fighting going on only 50 kilometres (30 miles) from N'Djamena and the UN is reportedly taking all non-essential staff out of the city.
A European Union force about to go into service in Chad has, however, delayed its first two troop flights due to the current situation.
Dan Harvey, a spokesman on behalf of the commander of the military operation, explained that the planes were due to arrive on Thursday night and Friday morning with over 100 troops from Austria and Ireland.
The troops are being sent to protect refugees from Sudan's Darfur region as well as the people who have been endangered and displaced.
Rebel sources had claimed that a column of 300 vehicles was heading for N'Djamena, after they had captured Oum Hadjer, a town in the central Batha area.
Because of these reports increased security has been brought into action in N'Djamena, and the majority of schoolchildren have been sent home.
Chad's ambassador to the US, Mahamoud Bechir, has stated that the rebel forces are heavily armed and has confirmed that they are close to N'Djamena, but he has played down reports of near governmental collapse.
