Israeli troops fought fierce battles with Hezbollah fighters on Friday in different areas in south Lebanon, including a coastal town that is home to the headquarters of U.N. peacekeepers.

A spokesman for the U.N. peacekeeping force known as UNIFIL told The Associated Press that they are monitoring “heavy clashes” in the coastal town of Naqoura and the village of Chamaa to the northeast.

UNIFIL’s headquarters are located in Naqoura in Lebanon’s southern edge close to the border with Israel.

“We are aware of heavy shelling in the vicinity of our bases,” UNIFIL spokesman Andrea Tenenti said. Asked if the peacekeepers and staff at the headquarters are safe, Tenenti said: “Yes for the moment.”

Several UNIFIL posts have been hit since Israel began its ground invasion of Lebanon on Oct. 1, leaving a number of peacekeepers wounded.