The US Coast Guard is asking ships operating in Hilo Harbor in Hawaii to watch out after a container spill Tuesday.

The agency said as many as 12 containers fell off the Young Brothers-owned 4,511-gt container barge Ho Omaka Hou (built 2007).

Two have since been retrieved and another two located with the help of Cates Marine and American Marine, the latter of which is using a 250-ton crane to lift the containers out of the water.