(Reuters) - The U.N. Security Council's five veto powers are close to approving new sanctions on North Korea to cut the isolated state's earnings from exports by more than a quarter, principally by targeting its coal exports to China, diplomats said on Friday.

The U.S.-drafted resolution, in response to North Korea's fifth nuclear test in September, would set a U.N. cap on North Korean coal exports with the aim of cutting hard currency revenues by at least $700 million.

The resolution would also restrict North Korea's maritime and financial sectors. If successful, it could cut the country's $3 billion in annual export earnings by at least $800 million, U.N. Security Council diplomats said.

The diplomats did not want to be identified as discussions were still under way. The new resolution would also target other North Koreans individuals and entities, they said.

Exports of coal from the North would be capped at $400.9 million or 7.5 million metric tonnes per year, whichever is lower, starting on Jan. 1, according to the draft resolution obtained by Reuters.

As soon as the resolution is adopted, North's coal exports to the end of this year will be capped at $53.5 million or 1 million metric tonnes, whichever is lower, the draft showed.

Over the first 10 months of the year, China has imported 18.6 million tonnes of coal from North Korea, up almost 13 percent from a year ago.

The restrictions on coal would bar exports connected to individuals and entities involved in North Korea's weapons programs, the draft resolution said.

The resolution added 11 individuals, including people who have served as ambassadors to Egypt and Myanmar, and 10 entities as targets for travel ban and asset freeze for their role in the North's nuclear and ballistic missile programmes.

The resolution would also ban the North's export of helicopters, vessels and statues, banning contracts similar to the ones worth millions of dollars that the North had signed to build large statues in some African countries.

It called on U.N. states to reduce the number of staff at North Korea's foreign missions and limit the number of bank accounts to one per North Korean diplomatic mission and one per diplomat at banks in their territory, highlighting concerns that the North had used its diplomats and foreign missions to engage in illicit activities.

CHINA ON BOARD

Diplomats said on Wednesday that the United States and China had agreed on new U.N. sanctions to impose on North Korea, but Russia was delaying action on a draft resolution.

A senior U.N. Security Council diplomat who spoke on Wednesday believed China could persuade Russia to agree to the new sanctions and that the 15-member Security Council could vote on the draft resolution as early as next week.

The United States and China, a close ally of North Korea, have been negotiating a new draft Security Council resolution to punish Pyongyang since North Korea's fifth and largest nuclear test on Sept. 9.

The draft text was recently given to the remaining three permanent council veto powers - Britain, France and Russia.

Chinese Foreign Ministry spokesman Geng Shuang said this week China supported further Security Council action in response to North Korea's nuclear test, but details of the draft resolution were still being discussed.

The aim of the draft resolution is to close loopholes in sanctions imposed in March, following Pyongyang's fourth nuclear test in January.

The March sanctions banned the 193 U.N. member states from importing North Korean coal, iron and iron ore unless such transactions were for "livelihood purposes" and would not generate revenue for Pyongyang's nuclear and missile programs.

U.S. officials said China is now the only importer of North Korean coal. After a fall in exports following the announcement of the March sanctions, North Korean coal exports rose again and 2016 totals are expected to exceed year-ago levels, they said.

(Reporting by David Brunnstrom, Michelle Nichols and Jack Kim; Editing by Lisa Shumaker and Himani Sarkar)