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 an agreement on patrolling their shared Himalayan border, according to the two governments, potentially easing the icy hostility between the Asian giants after a deadly skirmish between their troops four years ago.

Tensions between the Asian powers had flared in recent years following a border clash that left at least two dozen soldiers dead.