Solomon Islands police have put in place a liqour ban for the duration of the Melanesian Spearhead Group Leaders summit.
All liqour outlets have been closed and black market areas are being patrolled by police.
Police says they are also concerned about unregistered groups gathering in support of the West Papuans, who have formally applied for MSG membership.
Senior police officers say people under the influence of liqour could be more expressive of their views which could spark problems.
However they remain optimistic that Honiara residents will remain supportive of their Melanesian leaders gathering on home ground.