India and Pakistan are scrambling resources both military and diplomatic to respond to a crisis triggered by a massacre in Indian-controlled Kashmir that has heightened fears of a conflict between the nuclear-armed rivals.

Russian Foreign Minister Sergei Lavrov spoke to his Pakistani counterpart on Sunday and offered Russia's help in resolving tensions between Pakistan and India over Kashmir, the Foreign Ministry said.

The April 22 terrorist attack in Kashmir inflamed a long-simmering conflict that could boil over into military confrontation.