Fighters from the Democratic Forces for the Liberation of Rwanda (FDLR) were behind the April 24 attack, said Major General Maurice Aguru Mamba, citing a preliminary investigation.
He told a news conference those who attacked the UNESCO World Heritage site, known for its mountain gorillas, were from a “specialised unit” of the FDLR.
“Our sources are credible,” said Aguru Mamba, who commands CORPPN, a corps assigned to the protection of national parks and natural reserves.
The 17 people were killed in an ambush near the headquarters of the park in North Kivu province bordering Rwanda and Uganda.
Virunga park management said it had “precise indications” that the FDLR was responsible but three days later the FDLR denied the claims and blamed Rwandan government troops.
Rwandan President Paul Kagame last Monday denied persistent rumours that Rwandan soldiers had infiltrated eastern DRC to fight the FDLR, whose leaders were involved in Rwanda’s 1994 genocide that killed about 800,000 people — mainly Tutsis.
The DRC army has been fighting an array of armed groups in the east of the vast central African country for nearly three decades.
Visits to Virunga have been suspended since March 19 in DR Congo’s bid to halt the new coronavirus pandemic.
The park previously banned visitors between May 2018 and the start of last year after two British tourists were kidnapped. They were later released unharmed.
A total of 176 of Virunga’s rangers have been killed in the last 20 years.