The Rwandan leader claims that Kinshasa has armed FDLR and uses it to fight the M23, who are Congolese.
"I must confess, President Ruto is supporting Rwanda, and I won't say anything more about that," Tshisekedi said during a DRC session hosted by the Brookings Institution.
Unnamed prominent Kenyan figures are said to have supported the formation of a group sympathetic to the M23 rebels
M23 fighters captured several villages near Rutshuru, leading to a surge in displacement as villagers fled to escape the violence.
President Ruto’s clear answer must have come as a jolt to President Felix Tshisekedi.
Belgian envoy Roxane de Bilderling says more should be done to hold Rwanda to account amid an escalating crisis in eastern DRC.
Goma has a resident population of one million, with another million displaced by the war crammed into desperate, temporary camps that have become the frontlines.
Intense fighting between the Congolese army and resurgent M23 rebels has displaced thousands in the North Kivu Province.
Salva Kiir, himself facing ethnic clashes and political tensions in his country ahead of the elections this year, aims to prevent a full-scale war.
The surge of violence in and around Drodro has triggered a mass exodus from the area, with thousands of people seeking refuge at Rho camp for displaced people, about 6 miles northeast of Drodro.
Both the DRC and Burundi accuse Rwanda of supporting the M23 and Red Tabara rebels who have been wreaking havoc in the two countries.
The DRC demanded the withdrawal despite UN concerns about rampant violence in the east of the country.
Rwanda, led by President Paul Kagame, has in the past denied accusations of supporting the RED-Tabara and the M23 rebels.
Both the DRC and Burundi accuse Rwanda of supporting the M23 and Red Tabara rebels who have been wreaking havoc in the two countries.
The M23, a rebel group, has faced accusations from both the UN and international human rights organizations of perpetrating atrocities in eastern DRC.
The country currently has 6.7 million people displaced within its borders, amid serious flooding emergencies and a resurgence of measles and cholera outbreaks.
The United States-based Center for Civilians in Conflict on Tuesday denounced the use of heavy artillery and mortar shells against civilian installations.
Rwanda cited repeated violations of its airspace by Congolese fighter jets as contributing to the heightened tensions.
As the 37th AU Summit opens in Addis Ababa, the DRC's admission to the Peace and Security Council after 22 years marks a significant step towards regional cooperation.
