People living in the Shortland Islands on the Solomon Islands side of the border with Papua New Guinea have raised grave concerns at the increasing numbers entering the country from Bougainville.
The Solomon Star newspaper says local people fear this might lead to the illegal movement of people or drug smuggling.
Their concern was presented to the Solomon Islands National Parliament Foreign Relations Committee in Gizo in Western Province recently.
The Foreign Relations Committee is reviewing the work of RAMSI in the country.
Representatives appearing before the Committee say many foreigners illegally entered Solomon Islands through Bougainville.