Three United Nations workers abducted in Afghanistan more than three weeks ago have been released.
Afghan and U.N. officials confirm the three were freed, but the circumstances and time of their release are not clear.
The officials added that the freed hostages were being checked by doctors at a NATO field hospital in Kabul.
The kidnappers had threatened to kill the captives unless 26 Taleban prisoners held by U.S. and Afghan authorities were released.
The U.N election workers -- women from Northern Ireland and Kosovo and a Philippine man -- were kidnapped in Kabul on October 28th.