"I am deeply troubled by the appalling atrocities against the civilians there," the UN secretary general told reporters during a visit to Czech capital Prague.
He added that he hoped the European Union, the African Union and the United Nations would "work together to establish peace and stability" in the gold- and diamond-rich country with a population of 4.6 million people.
About a quarter of its residents have been displaced and hundreds of thousands of others face starvation because of the conflict between the Christian majority and minority Muslims, according to UN agencies and aid charities.
Ban told Czech media later today that he had asked Prime Minister Bohuslav Sobotka to send troops to the Central African Republic as part of a planned UN mission comprising 12,000 soldiers and police officers.
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Earlier this week a statement released by Ban's spokesman on the Central African Republic called for the compilation of a list of individuals who "act to undermine peace, stability and security" in the country.