KAHUKU, Hawaii (AP) — Honolulu firefighters are trying to douse flames that have shut down an Oahu wind farm.

The fire broke out Wednesday morning in a battery energy storage building at First Wind's Kahuku wind farm.

Hawaii News Now (http://ow.ly/cG6iv ) reports battery packs inside the building store energy collected by the wind turbines.

Captain Terry Seelig told the Honolulu Star-Advertiser (http://ow.ly/cG6k1 ) firefighters are using dry chemicals to smother the fire because the voltage of the system won't allow them to use water.

Seelig says fire personnel are focusing on saving the surrounding buildings because the battery building appears to be collapsing.

No injuries have been reported. All 12 of First Wind's turbines remain offline.

Hawaiian Electric says the fire isn't affecting its ability to provide power to customers.