In the evening hours of Friday, twelve containers were washed overboard of the container ship Manoa, owned by US-based shipping company Matson Navigation Co, due to heavy weather and seas, according to US Coast Guard.
Manoa was on its way from the Port of Oakland to Seattle when the containers slid off its deck some 8 miles outside the Golden Gate.
The containers were empty with the exception of miscellaneous packing material.
No hazardous materials were within the containers and no adverse impacts to the marine environment have been reported at this time, the USCG said.
USCG added that Matson has hired an environmental contractor to recover discharged debris and containers.
One container has been located as it washed ashore at Baker Beach, San Francisco.
An environmental contractor is in the process of removing the container and miscellaneous packing contents from the beach.
The authorities continue the search for the remaining containers.