There are signals that fighting may soon erupt between the Congolese government and the M23 rebels.
Promised not to interfere in Congo internal affairs; also agreed not to support armed groups.
The arrest of the alleged coup plotters represents the latest example of South Africa finding itself caught in the middle of international intrigue.
Nineteen alleged members of a Congolese rebel group — including one U.S. citizen — sought help in their effort to overthrow Congolese President Joseph Kabila.
Those arrested were suspected of plot against government.
The exodus from villages and into the bush follows an army operation that started two weeks ago in Katanga province.
Negotiations with Rwanda-backed M23 rebels on brink of collapse.
Government and M23 rebels reviewing terms of a 2009 agreement that rebels say Congo's leader broke.
Newest Security Council member has been bright spot in troubled region since 1994 genocide, but reports state is aiding Congo M23 rebels doing damage.
Talks between Congo government and M23 rebels are being put on hold for two weeks.
