The Solomon Islands opposition suspects the alleged plot to assassinate the Prime Minister could be government propaganda.
The opposition says reports of the alleged conspiracy to murder Manasseh Sogavare could be a bid by the government to boost support for its plan to rearm the police.
The opposition leader, Fred Fono, has called on the police to thoroughly investigate the reports to establish if there indeed was a plot.
Mr Fono says he suspects the reports could have originated from the Sogavare-led government.
"The opposition group is calling on the police to have a thorough investigation so its not seen as propaganda to make the government's attempt at rearming look good in the face of those assassination attempts."
Reports say an accused assassin hiding in the jungle is allegedly involved in a plot with an Australian war veteran to take out Mr Sogavare.