It was early on Tuesday morning that a large number of armed men attacked the prison, which is located in the town of Beni, as well as a military camp that was set to protect it.
Two prisoners were shot dead during the process, but when it was all over, only 100 of the more than 1,000 prisoners remained in prison.
Not the first time
According to the mayor of the place, the attack may have been carried out by a militant Islamist group active in the area.
But another source told Reuters that it may have been the armed group ADF that carried out the act.
However, no group has taken on the responsibility.
This is not the first time that prisoners have escaped from prison. In 2017, a similar number managed to get out of there during a similar attack.