Will try to revive stalled peace talks with M23 rebels in eastern Congo.
Follows a week of heavy fighting between U.N. troops and rebels.
A day after cross-border shelling left one Rwandan civilian dead.
Foreign minister tweeted "When they are, you will know" at Al Jazeera.
At least one person was killed after shells landed in a border town.
New attack has escalated tensions between Congo and Rwanda.
Says it is waiting for an explanation from Rwanda for the rebel attack.
Comes after years of being blocked and seeing its leaders murdered, though unclear if it will take part in elections.
Huamn Rights Watchs says support ongoing even as killings, rape occur.
Heavy conflict between the Congo army and M23 rebels resumed Monday morning.
