SEATTLE (AP) — The City of Seattle is asking Yakima County and state corrections officials why prisoners who had been released were dropped off underneath Interstate 5 downtown.

KING-TV reports a video sent to Mayor Jenny Durkan’s office captured the incident April 8.

In the video, a corrections officer is seen removing handcuffs from three people who are then seen walking away.

Durkan then asked the State Department of Corrections why the people were released without supervision or guidance.

Corrections Director Steve Sinclair wrote Durkan April 12 saying the video also raised concerns among corrections officials and that the employees in the video aren’t with the state but with Yakima County Sheriff’s Office.

Sinclair says Yakima jail officials report that the drop-off wasn’t standard practice and they are looking into it.