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 as both countries’ leaders arrive in Russia for a summit.

India and China have reached a deal on patrolling their disputed Himalayan frontier to resolve a four-year military stand-off, Foreign Secretary Vikram Misri said on Monday, paving the way to normalise political and business ties.

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.