Indonesia and Australia are planning to expand their security cooperation to include Japan and Papua New Guinea, according to Jakarta's Defence Minister, Sjafrie Sjamsoeddin. Trilateral security arrangements would be developed with Indonesia, Australia and Japan, and between Indonesia, and Australia, respectively. The two leaders signed a security treaty last month, pledging to consult each other if either country is threatened. They also discussed the possibility of developing a defence training facility on the island of Morotai on North Maluku, with a proposal to upgrade its existing defence infrastructure.