Beijing underscored its "resolute opposition" to any form of "Hong Kong independence" activities, either within or outside of the special administrative region's Legislative Council, an official statement said on Monday.

The statement, issued by the Hong Kong and Macao Affairs Office of the State Council, noted that certain organizations and candidates were publicly advocating "Hong Kong independence", capitalizing on the exposure afforded to them because of the LegCo election, which was held on Sunday.

The statement reiterated that "Hong Kong independence" is against the Constitution of China, the Basic Law and relevant laws of the Hong Kong SAR, that it was a threat to China's sovereignty and security, damages the prosperity and stability of Hong Kong and is counter to the fundamental interests of Hong Kong citizens.

"We firmly support the Hong Kong SAR government to mete out penalties according to law," the statement said.

The term of office of the newly-elected LegCo members will begin on Oct. 1.