"It seems to me that an international investigation is needed, which would be more objective and would include Russia," Novak told reporters on the sidelines of the Russian Energy Week international forum.
Russia is ready to continue deliveries if buyers are interested, the official added.
Russia remains a reliable supplier of oil and gas to Hungary, and the countries will continue to develop relations in the energy sector, Novak emphasized.
"Despite all the difficulties and problems related to sanctions restrictions and everything else, Russia remains to be a reliable supplier of resources to Hungary. We are talking about oil supplies through the Druzhba pipeline and gas supplies through the Turkish Stream pipeline," he said.
Global demand is not expected to peak for neither oil nor gas in the coming decades, the deputy prime minister noted.
"In my opinion, there will be no peak demand for oil or gas until 2050," he told reporters.
It is important for the world to prevent shortages of energy resources, as such risk exist, Novak said.
"Over the past 10 years, the global demand for global energy has grown by about 13-14%. In the next 20 years, these rates will be no less, and maybe even higher. We will see a 25% increase in primary energy consumption," he added.
Russia has 10% of foreign equipment left to substitute in the oil industry, Alexander Novak pointed out.
"To date, there are only about 200 types of equipment left… Now there is 10% of the amount of equipment that we did not produce, but bought abroad," he said.
In the next few years, it is planned that Russian enterprises will start making the remaining types of equipment, which will ensure the technological sovereignty of the country, Novak added.
The Russian government is working on President Vladimir Putin's instructions to limit the export of raw materials to unfriendly countries.
"The government is currently working on this assignment, there is a specific analysis of the current situation on world markets and Russia's capabilities. Proposals will be ready in the near future," Novak elaborated.
The list of banned products will include both minerals and processed products, the official added.