NEW : Haiti 's government appears to have lost control of Cap Haitien . NEW : Haitians blame the Nepalese contingent of peacekeepers . NEW : The UN says it is investigating reports that a Nepalese soldier was killed in an attack on a U.N. base. MINUSTAH charges the riots may be intended to spread unrest ahead of the elections .
NEW : Haiti 's government appears to have lost control of Cap Haitien . NEW : Haitians blame the Nepalese contingent of peacekeepers . NEW : The Centers for Disease Control and Prevention says it 's likely impossible to pinpoint the source . MINUSTAH charges the riots may be intended to spread unrest ahead of the elections .