Updated

Soldiers from neighboring Chad are now helping the government of Central African Republic fight a rapidly advancing rebel movement.

Thierry Zamby, a spokesman for the defense minister said Wednesday that the Chadian troops will help to retake the towns that have fallen to the rebels in recent days.

Some 2,000 Chadian soldiers arrived Tuesday in the Central African Republic after a trio of rebel groups pushed ahead and took the central mining town of Bria, the fifth town to fall into rebel hands in their two-week-old offensive.

The rebels are demanding that the government re-negotiate the terms of past peace accords, in what is being described as one of the biggest threats to the government of President Francois Bozize.

This troubled nation of 4.5 million has weathered numerous coups, as well as repeated rebellions.