United Nations Secretary-General Antonio Guterres said on Friday he is profoundly concerned by escalating tensions between Israel and Lebanon's Hezbollah and that UN peacekeepers are working to calm the situation and prevent miscalculation.

"One rash move - one miscalculation - could trigger a catastrophe that goes far beyond the border, and frankly, beyond imagination," he told reporters. "Let's be clear: The people of the region and the people of the world cannot afford Lebanon to become another Gaza."