Hanquart described Wednesday's work stoppage -- also observed in other towns -- as a "day of indignation in the face of all that the people and the NGOs suffer."
The local UN Office for the Coordination of Humanitarian Affairs (OCHA) has said that since the end of June thefts, break-ins and lootings have surged in many towns including Kaga Bandoro.
One of the world's poorest countries, the CAR plunged into a religious-tinged conflict in 2013 when a mainly Muslim rebel alliance, the Seleka, overthrew the majority-Christian country's president, Francois Bozize.
France intervened to help remove the Seleka, and the following year the United Nations deployed a large military force on a peacekeeping and stabilisation mission.
However, the country remains violent and unstable. Most of its territory is in the hands of militia groups, many of them claiming to protect Muslims or Christians and fighting over resources.