MOSCOW - U.S. Secretary of State John Kerry on Tuesday accepted Russia's long-standing demand that President Bashar al-Assad's future be determined by his own people, as Washington and Moscow edged toward putting aside years of disagreement over how to end Syria's civil war.

"The United States and our partners are not seeking so-called regime change," Kerry told reporters in the Russian capital after meeting President Vladimir Putin. A major international conference on Syria would take place later this week in New York, Kerry announced.

Kerry reiterated the U.S. position that Assad, accused by the West of massive human-rights violations and chemical weapons attacks, won't be able to steer Syria out of more than four years of conflict.

But after a day of discussions with Assad's key international backer, Kerry said the focus now is "not on our differences about what can or cannot be done immediately about Assad." Rather, it is on facilitating a peace process in which "Syrians will be making decisions for the future of Syria."

Kerry's declarations crystallized the evolution in U.S. policy on Assad over the last several months, as the Islamic State's growing influence in the Middle East has taken priority.

President Obama first called on Assad to leave power in the summer of 2011, with "Assad must go" being a consistent rallying cry. Later, American officials allowed that he wouldn't have to resign on "Day One" of a transition. Now, no one can say when Assad might step down.

Russia, by contrast, has remained consistent in its view that no foreign government could demand Assad's departure and that Syrians would have to negotiate matters of leadership among themselves. Since late September, it has been bombing terrorist and rebel targets in Syria as part of what the West says is an effort to prop up Assad's government.

Earlier Tuesday in the Kremlin, Putin noted several "outstanding issues" between Russia and its former Cold War foe. Beyond Assad, these include which rebel groups in Syria should be allowed to participate in the transition process and which should be deemed terrorists, and like the Islamic State group and al-Qaeda, combated by all.

Jordan is working on finalizing the list of terrorist vs. legitimate opposition forces. Representatives of Syria's opposition themselves hope this week to finalize their negotiating team for talks with Assad's government. The United States, Russia, and others hope those talks will begin early next year.