(AP) - Prosecutors are investigating a video threat purportedly made by a hacking group that wants them to release the names of three Vineland police officers involved in the arrest of a man who died while in custody.

The Philadelphia Inquirer reports that the video was posted Monday with no time stamp. The video featured a masked figure - speaking in a generic, computerized voice - who warned city police and Cumberland County prosecutors that they had "24 hours" to release the officers' names.

The short video warned if the demand was not met, the group would release the officers' names, along with their personal information. On Tuesday morning, the names of what were described as two of the officers and their home addresses were posted on a web site that has been used by hackers.