A Russian news agency says Foreign Minister Sergey Lavrov will travel to Washington next month for talks on nuclear nonproliferation with US counterpart Hilary Rodham Clinton. RIA Novosti cites Foreign Ministry official Igor Neverov as saying the talks will take place May 7. US President Barack Obama has made curbing the nuclear threat a top priority. The current agreement between Washington and Moscow to limit nuclear arsenals, known as the Strategic Arms Reduction Treaty, expires December 5. Obama and Russian President Dmitry Medvedev have set a nominal July deadline for the substitute treaty. That date would coincide with Obama's first presidential visit to Russia.