Authorities are investigating a dramatic breakoutbreakoutAn escape from a place of confinement that took place late Tuesday night at Riverbend Correctional Facility. Three inmates escaped during a carefully planned security failure.

The escape began shortly after 11:30 p.m. Officers did not fully take intake inTo fully understand or absorb something the seriousness of the situation at first — some believed it was a minor disturbance.

Sources say the inmates staged an electrical problem as a cover-upcover-upA deliberate concealment of facts to hide the truth to distract staff. During the confusion, they forced open a service door and climbed the outer fence.

Police believe the group arranged a getawaygetawayA vehicle or plan used to escape quickly vehicle in advance. A dark van was seen leaving a nearby access road at the same time.

Although there was no violent outbreakoutbreakA sudden start of something dangerous or uncontrolled inside the prison, extra officers were called in as backupbackupExtra support or reinforcement. Residents were told to stay indoors.

Summing upsumming upConcluding or giving a final summary, authorities describe the event as a serious breach but say the situation is now under control. Two inmates were captured; one remains at large.