United Nations Secretary-General Antonio Guterres expressed increasing concern over the escalating war of words and deadly border clashes between Israel’s military and Lebanon’s Hezbollah fighters.

UN peacekeepers are working to calm the situation and prevent 'miscalculation' after both sides heightened their rhetoric and raised the possibility of full-scale conflict, he said on Friday, reports Al Jazeera.

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

A UN peacekeeping force UNIFIL, as well as unarmed technical observers known as UNTSO, have long been stationed in southern Lebanon to monitor hostilities along the demarcation line between Lebanon and Israel, known as the Blue Line.

“UN peacekeepers are on the ground working to de-escalate tensions and help prevent miscalculation,” Guterres said. “The world must say loudly and clearly: immediate de-escalation is not only possible – it is essential. There is no military solution.”

Hezbollah has fired rockets and drones into Israel since it launched the war on Gaza last October with the Israelis responding with deadly air strikes and heavy artillery fire. Hundreds have been killed and tens of thousands displaced along the border.

Israeli Prime Minister Benjamin Netanyahu and Defence Minister Yoav Gallant have previously pledged to “turn Beirut into Gaza”. This week, Hezbollah leader Hassan Nasrallah warned of “no restraint and no rules” if Israel launches a major attack on Lebanon.