Ethiopia's military says it has entered South Sudan and surrounded villages where more than 100 children abducted from Ethiopia are being held.
The children were taken when suspected ethnic Murle fighters attacked villages in Ethiopia's southwestern Gambella region on Friday. More than 200 people were killed in those attacks.
South Sudan's government says it is cooperating with Ethiopia's military. Acting Foreign Minister Peter Bashir Gbandi said South Sudan's army was not involved in Friday's attacks.
Baba Medan, governor of Boma state where the Murle live, blamed fighters of the Cobra faction, a former militia in the area, for the attack.
The Cobra rebelled against South Sudan's government from 2011 to 2013.
David Yau Yau, who led the Cobra rebellion, denied they were responsible. He told VOA the suspects were militia armed by Medan himself.
