Fire Ant Invasion Spreading Across Islands

HILO (KHNL) -  The infestation of fire ants on the Big Island and Kauai is quickly spreading.

Researchers say it will be difficult to stop the ants' march to the rest of Hawaii unless the state steps up efforts to contain them.

The fire ants were first discovered in Puna in 1999. 

Since then, they have been identified at more than 50 sites on the Big Island and one on Kauai.

The ants have spread throughout Hilo, Mountain View, Kalapana and Laupahoehoe.