1689
the unrest continues there and this follows up the shooting we talked about yesterday in which at least seven iraqis were killed by u . s . fire after they apparently came under fire trying to secure a certain part of the central part of mosul .
 ( attack: shooting,  u . s: attacker, part: place, iraqis: target) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: declare bankruptcy, transfer ownership, transfer money, marry, transport, die, phone write, arrest jail, convict, sentence, sue, end organization, start organization, end position, start position, meet, elect, attack, injure, born, fine, release parole, charge indict, extradite, trial hearing, demonstrate, divorce, nominate, appeal, pardon, execute, acquit, merge organization, Arguments type: beneficiary, prosecutor, plaintiff, seller, victim, buyer, agent, destination, artifact, organization, recipient, person, place, origin, target, giver, adjudicator, attacker, vehicle, defendant, entity, instrument. 
Text: {0} 
Answer:
 ( attack: shooting,  u . s: attacker, part: place, iraqis: target) 