LONGMONT, Colo. (CBS4) – Investigators in Longmont are hoping someone will recognize the voice of someone who made a phone threat about Longmont United Hospital.

At about 7 p.m. on Sunday a 911 dispatcher got a call about the threat.

Police hope someone will know the caller’s voice, which can be heard in the video clip below saying there was a suspicious object planted in the hospital.

The hospital was locked down and searched but no device was found.

Normally it isn’t CBS4′s policy to report bomb threats, but in this case police are asking for the public’s help. Anyone with information is asked to call Longmont Police at (303) 651-8555.