Both schools were badly damaged by fire from the bombs. The attack in which the injuries took place was on a girls' class.
In Khost Province, militants attacked a police post, killing two police officers. Two of the attackers were also killed in the fighting.
And the U.S. military reported that four people, who the military identified as "Islamic extremists," were killed in air strike late yesterday in Oruzgan Province.
(AP, AFP, Reuters)