Mahbob Amiri, head of Afghanistan's quick-reaction force, said Monday's bomb in the capital detonated as a United Nations vehicle drove past.
There was UN presence in the city when the bomb exploded.
( z1 present :ARG1 ( z2 organization :name ( z3 name :op "UN" ) ) :ARG2 ( z4 city ) :time ( z5 explode :ARG1 ( z6 bomb ) ) )