WASHINGTON, Dec 20 (Reuters) - The United States is pledging up to US$100 million (S$127 million) to help support African Union efforts in the Central African Republic, the US State Department said on Friday.

"The United States remains deeply concerned about the horrific violence committed by armed groups against innocent civilians" in the Central African Republic, department spokeswoman Marie Harf said in a statement.

The funds are to assist the African Union-led International Support Mission in the Central African Republic, or MISCA, with non-lethal equipment and training as well as logistical and planning support, the department said.