Photos and video by Baron Sekiya/Hawaii247.com

Fire/Rescue, police and Hazmat crews were called to the scene of an 'acid bomb' which had detonated at Rainbow Falls Park.

Fire/Rescue including Hazmat crews and police responded to Rainbow Falls State Recreation Area restrooms Wednesday at 11:30 a.m. for what appears to have been an ‘acid bomb’ explosion.

DLNR workers cleaning the restrooms discovered a dustpan producing smoke from the residue swept into it. The fumes irritated the eyes of one worker and the residue was washed down the drain.

Hazmat crews and police determined the residue was from the detonation of an apparent homemade ‘acid’ explosive device left in the men’s room producing a sulfuric acid odor. A second apparent device in the other restroom was recovered.

The restrooms were closed during the investigation and later opened when evidence was cleared and the restrooms were washed down.

The DLNR worker was treated on scene and released.

Police have not reported whether they have any suspects yet.  

DLNR workers Jody Whitney, left, and Kyle Takeya were working at the scene of the acid bomb explosion. Takeya found the device residue and was treated by medics on scene.

The men's room where DLNR workers encountered fumes from an 'acid bomb' residue.