Cambodian National Petroleum Authority denied to comment on media reports Thursday that two companies were close to signing drilling contracts for onshore oil exploration.
France's Total and the government Chinese national Offshore Oil Corp near deals for onshore exploration, the Cambodia Daily reported Thursday.
Petroleum authority chief Te Doung Dara would not confirm the report.
Sok Sina, an independent economic analyst, said the government should show the contracts to the public for consideration before signing them.
Eng Chhay Ieng, secretary-general of the Sam Rainsy Party, called the agreement a "mystery" related to corruption.
"Because we are the MPs, want to know the agreement," he said, "and the government must show us what they will do and what the meaning of the agreement is."