Two of Martin Luther King Jr.'s children have been sued by the institution their mother founded, accused by their brother of using The King Center for personal gain.

Dexter King, the center's chairman, filed the lawsuit Monday against his brother and sister, Martin Luther King III and Bernice King. He says his siblings have established foundations in direct competition with The King Center for Nonviolent Change.

Dexter King also says in the lawsuit that his brother used the center without permission to meet with then-presidential candidate John Edwards in January 2008.

A King family matter previously played out in the media when Bernice and Martin Luther King III sued their brother in July. They wanted to force him to open the books of their father's estate.