U.S. President Barack Obama and Russian President Dmitri Medvedev say they still plan to have a replacement START nuclear arms reduction treaty ready by the end of the year.

Mr. Obama and his Russian counterpart met in Singapore Sunday after the close of the Asia-Pacific Economic Cooperation forum.

The two leading nuclear powers have committed to a replacement for their Start-One pact, which expires on December 5.

The two leaders also said time is running out for Iran to agree to a deal to ship its enriched uranium out of the country for further processing.

Mr. Medvedev said he still hopes to convince Iran to send its enriched uranium to Russia, where it could be further processed to fuel an aging reactor in Tehran.

Some information for this report was provided by AFP, AP and Reuters.