The attack followed several days of disturbances in the city where American soldiers exchanged fire with an unknown number of attackers as civilians carried out demonstrations against the American presence .
The attack came after several days of disturbance in the city in which U.S. soldiers exchanged fire with an unknown number of attackers as civilians protested the American presence .
Because of the holiday period , the agency will not release data from the period since Dec. 27 until today .