Congo's military intelligence chief died on Friday after suffering a heart attack, his wife said, following media reports that an investigation had been opened into allegations that he tried to destabilise the country.
Delphin Kahimbi was also under European Union sanctions over alleged human rights abuses when he commanded operations against rebels in east Democratic Republic of Congo in the 200Os and during his tenure as military intelligence chief.
Kahimbi was appointed by former President Joseph Kabila, and his successor as head of state, Felix Tshisekedi, had been under pressure from the United States to hold the general to account for alleged human rights abuses.
"He had a heart attack at home and he died soon after we arrived at the hospital," his wife, Brenda Kahimbi, told Reuters by phone.
Two sources in the security service said Kahimbi had recently been suspended over the accusations that he had sought to hide weapons and destabilise the country.
The authorities did not immediately comment on Kahimbi's death and have not commented on the accusations against him or the reports that he had been suspended.
Kahimbi had also been barred this month from leaving the country, the security sources and two sources in the migration service said.
Kahimbi was included in December 2016 on a list of Democratic Republic of Congo officials whose assets were frozen and were barred from travelling to the EU.
In response to reports that Kahimbi had been suspended, the US ambassador to Congo, Mike Hammer, tweeted on Thursday: "As we have consistently said, those who are corrupt, commit violations of human rights, or disrupt the democratic process should be held accountable."