Gunmen killed one soldier and wounded three others in an ambush of a convoy carrying the chief of a commission set up to disarm fighters in Ivory Coast.
Ivory Coast's state broadcaster said that Fidele Sarassoro was unhurt in the attack, which happened in a northern area of the West African country.
Sarassoro heads a national commission to disarm rebels who battled for years for control of the country following an attempted coup against ex-president Larent Gbagbo in 2002.
The attack came as the current president, Alassane Ouattara, prepared to visit the region, which was under rebel control from 2002 to 2010.
Gbagbo's refusal to cede office after losing the November 2010 election to Ouattara sparked five months of violence that killed at least 3,000 people.