The Australian government said on Sunday it would deploy its armed forces to assist in recovery efforts after the U.S. Marine Corps suspended its search for three Marines missing since their aircraft crashed off Australia's northeast coast a day earlier.

The Marine Corps said earlier they had shifted from a search-and-rescue effort to a recovery operation, which could last several months, and had notified the next-of-kin of the three missing Marines.

"The transition comes after teams led continuous sustained search efforts supported by aircraft and ships," the III Marine Expeditionary Force, based in Okinawa, said.