The soldiers, who were said to have been wearing Arab headdress, were accused of firing at Iraqi police when stopped at a road block.
Iraqi police set up a roadblock and were fired upon. 
( z1 and :op ( z2 set-up :ARG0 ( z3 police :mod ( z4 country :name ( z5 name :op "Iraq" ) ) ) :ARG1 ( z6 roadblock ) ) :op ( z7 fire :ARG1 z3 ) )