General Angelo Restoschia said any incident could lead to an escalation. NATO military chief said Moscow knew nothing of what was happening on the ground.
Comments come as citizens of Albanian nationality in northern Kosovo demonstrated against what they described as Serbian gang violence against police and peacekeepers. US Secretary of State Antony Blinken urged the leaders of Serbia and Kosovo to reduce tensions, warning that they were threatening hopes of joining Europe. The NATO-led international peacekeeping force in Kosovo has stepped up deployments in the four municipalities where there is unrest.