Afghan authorities have discovered the bodies of two intelligence agents kidnapped by suspected Taleban militants earlier this week.
Officials said Wednesday the men were abducted while on a mission in western Farah province, and their bodies were dumped in the desert.
They said members of the ousted Taleban were likely behind the killings.
Meanwhile, police in central Ghazni province arrested a Taleban commander, Mullah Nazer Shah, after his men set fire to a school.
Officials have blamed Taleban rebels for a series of attacks on educational facilities, including fires at a dozen schools and the killing of several teachers.
In other developments, 150 British troops have arrived in southern Helmand province to form part of a NATO peacekeeping mission.
Britain has pledged 3,300 soldiers to the expanded NATO mission planned for Helmand.
Some information for this report was provided by AFP, AP and Reuters.