keywords: hostages darfur hostage rebels nairobi
text: Darfur rebels release aid workers held hostages, no word on 22 &lt;b&gt;...&lt;/b&gt; NAIROBI : Rebels in Darfur released six aid workers taken hostage over the weekend, aid agencies said, but there was still no word on the fate of 22 other health workers missing in the war-ravaged western Sudanese region.