U.S. President Barack Obama says there is room for another arms control deal with Russia.

After talks with Russian President Dmitry Medvedev at the Seoul nuclear summit Monday, Mr. Obama said both countries can continue to make progress in cutting stockpiles of nuclear weapons.

He said he plans to pursue another round of cuts with Russian President-elect Vladimir Putin.

Mr. Obama called the New START treaty with Russia, ratified in 2010, the most comprehensive arms treaty in 20 years.

Differences remain between the United States and Russia on such major issues as Syria and U.S. plans for a missile defense system in Europe.

Despite the disagreements, President Medvedev said Monday relations between the United States and Russia are their best in 10 years.