The meeting is being chaired by Solomon Islands, as the current holder of the MSG chairmanship.
Other full members are Papua New Guinea, Fiji, Vanuatu and New Caledonia's FLNKS Kanaks movement.
Discussions will focus on emerging trends of crime, as well as regional security issues and how MSG countries can contribute to UN operations around the world.
The meeting of police ministers is expected to discuss progress made on the Regional Police Academy initiative, for which Indonesia has offered the Pacific countries assistance.