In Afghanistan, four Afghan aid workers who were helping the United Nations remove landmines were killed in an ambush Saturday. Meanwhile a U.S. soldier was killed and nine others were wounded when a mine went off under their Humvee. The incident occurred near the eastern Afghanistan city Ghazni where eight U.S. soldiers died on Jan. 30 in an explosion at an arms depot.

U.S. officials are now saying security concerns and voter-registration problems may force the postponement of Afghan elections scheduled for June.

The San Francisco Chronicle is reporting that a 12-year-old boy named Asadullah Rahman has returned home to Afghanistan after spending 17 months locked up in Guantanamo Bay in Cuba. The boy says he was just 10 years old when he was jailed by the U.S. He was one of three detainees under the age of 16 that were recently released from Guantanamo.

And the New York Times is reporting that senior U.S. defense officials have said the government might never release some of the detainees being held at Guantanamo Bay.