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 share a disputed border that stretches 3,440 km (2,100 miles) and remains poorly defined. Natural features, such as rivers, lakes and snow-covered areas, cause the border to shift at times,

China has reached a resolution with India on resolving their border conflict and will work to implement solutions, a Chinese foreign ministry spokesperson said on Tuesday. China and India have been in close communication through diplomatic and military channels,