Chad says ended Sudan raids, 100 captured

* Chad says air force completed raids in Sudan

* Minister says 100 "mercenaries" captured

* Chad vows to destroy rebels, however far away

N'DJAMENA, May 17 (Reuters) - Chad said its air force had completed raids on "mercenaries" inside Sudan on Sunday, announcing its aircraft had destroyed seven groups of fighters while ground forces had captured 100 prisoners on the border.

Tensions between the two oil-producing neighbours escalated over the weekend after Sudan complained Chad had launched a series of bombing raids on its territory on Friday, calling the move an "act of war".

Chad had not previously confirmed the raids but said it was justified in sending its armed forces into Sudan due to the support the government in Khartoum allegedly provided ahead of and after a failed attack by rebels on Chad's army last week.

"Our defence and security forces have completely withdrawn from Sudan this afternoon," said Adoum Younousmi, Chad's interim defence minister.

"We destroyed seven pockets of groupings of mercenaries. We hit them with our aircraft along the border, without any collateral damage," Younousmi said in a statement, using the term mercenary to describe the eastern Chadian rebels.

"We captured about 100 prisoners who will be shown within 48 hours," he added.