A possible thief or vandal apparently caused a siren to go off in the middle of the night in Waimanalo.

The Hawaii Emegency Management Agency said the siren sounded at 12:40 a.m. after someone opened a control panel on the siren’s pole.

The siren had just been installed at Kaiona Beach Park in Waimanalo with a security alarm, which went off when the control panel door opened.

The city’s Department of Emergency Management muted the siren and re-secured the cabinet.

There was no emergency associated with the warning siren, and the public should be aware that in a real emergency, the siren would be accompanied by an Emergency Alert System message, the Hawaii Emergency Management Agency said in the news release.