Kabul - A roadside bomb that injured six U.S. soldiers in eastern Afghanistan, was followed by a blast near a Kabul police station, Monday, that hurt two police officers and a civilian.
east afghanistan is the safest part of the country
It cannot be known whether this is true or not because it is not mentioned whether such attacks happen in other parts of the country. 
( z1 safe :ARG0 ( z2 east :part-of ( z3 country :name ( z4 name :op "Afghanistan" ) ) ) :ARG2-of ( z5 have-degree :ARG1 z2 :ARG3 ( z6 most ) ) )