Angola said last week that direct peace talks between DRC and M23 rebels would begin in the Angolan capital Luanda, on March 18.
"At this stage, we can't say who will make up the delegation," Presidency Spokesperson Tina Salama said.
M23 has acknowledged receipt of Angola's invitation, its spokesperson Lawrence Kanyuka said on X on Sunday, without saying whether it would participate.
M23 made a series of demands after the talks were announced, including asking Tshisekedi to express his commitment to negotiate with them directly publicly.
Angola has been trying to mediate a lasting ceasefire and lower tensions between DRC and neighbouring Rwanda, which has been accused of backing the Tutsi-led rebel group. Rwanda denies those allegations.
--Reuters--