A UN official says the number of crimes against aid workers in the Central African Republic (CAR) over the past year have reached an all-time high.

Claire Bourgeois, the UN's humanitarian coordinator in the CAR, said Thursday that the office recorded around 50 attacks on aid workers in the past 12 months.

“The number of humanitarian workers who have been killed, kidnapped, and seriously injured in the Central African Republic has reached a level" which the country has never seen before, she noted.

The statement comes as violence in the capital city of Bangui left at least five people -- including a Red Cross worker – dead this week.

On Wednesday, the Red Cross volunteer was shot and killed as he was helping to evacuate the injured in Bangui.

The clashes also left about 40 people wounded, hospital officials said.

There are currently over 2,000 aid workers in the Central African Republic, the UN said.

The CAR descended into chaos last December, when Christian armed groups launched coordinated attacks against the Seleka group that toppled the government in March 2013.

In March 2014, UN Undersecretary General for Humanitarian Affairs and Emergency Relief Coordinator Valerie Amos said almost all of more than 100,000 Muslims once residing in the capital, Bangui, had fled the violence perpetrated by the armed Christians.

About one million people, or about a quarter of the population, have been forced from their homes due to the violence in the CAR.

The new interim Prime Minister of the CAR, Mahamat Kamoun, has vowed to reconcile the factions that are in conflict along ethnic and religious lines in the country.

On August 11, Kamoun said his top priorities were to form an “inclusive” government, restore security, and deal with the African country’s humanitarian crisis.