508
In a village near the West Bank city of Nablus on Tuesday , Israeli troops opened fire on youths throwing stones , hitting a 9 - year - old Palestinian boy in the head and critically wounding him , and hitting two 12 - year - old boys in the legs , lightly wounding them , Palestinian hospital officials said .
 troops: attacker; village: place; youths: target
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: attack 
  Option: victim, attacker, place, target, instrument 
Text: {0} 
Answer:
 troops: attacker; village: place; youths: target