US and Russian negotiators will hold a new round of talks next week on replacing the START nuclear disarmament treaty in Geneva, a US spokesperson confirmed on Wednesday.

"US and Russian negotiatiors will continue talks on an agreement to replace the Strategic Arms Reduction Treaty June 1 to 3 in Geneva," the spokesperson at the US mission in the western Swiss city told AFP.

No further details were given on the talks, which follow a first two-day round in Moscow last week and are due to be held behind closed doors at an undisclosed location here.

US President Barack Obama is due to travel to Moscow a month later for a groundbreaking summit with Russian President Dmitry Medvedev.

Following a thaw in US-Russian relations in recent months, Washington and Moscow agreed to press ahead with talks on replacing or renewing START.

The 1991 treaty, which limits the deployment of their nuclear arsenals, is due to expire on December 5.

Many obstacles remain, including a disagreement over US plans to deploy elements of a global missile shield in eastern Europe.

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