Chad ? Chad’s president broke off relations with neighboring Sudan, threatened to expel 200,000 refugees from Darfur and paraded more than 250 captured rebels through the streets of the capital Friday after a violent attempt to overthrow him.

The refugees could become casualties in a growing war of accusations between the governments of Chad and Sudan. If forced to return to their homes in the western Sudanese region of Darfur, they would find almost no food or shelter and be instantly preyed upon by militias that roam the land with impunity.

An attack by the rebel United Force for Change on N’djamena, the capital of this central African country, set off the latest crisis. At least 350 people died in the failed assault Thursday, Cabinet minister Gen. Mahamet Ali Abdullah said.