India and China have reached an agreement on military disengagement along their disputed border, New Delhi said, a step toward reducing frictions between the nuclear-armed neighbors that comes ahead of an expected meeting between the countries’ leaders on the sidelines of a summit in Russia.

India said it ended a four-year border stalemate with China, a significant step toward easing tensions and paving the way for a possible meeting between the leaders of both nuclear-armed countries at a BRICS summit this week.