The United Nations Interim Force in Lebanon (UNIFIL) has said two of the cross border tunnels, allegedly dug by Hezbollah, violate a 2006 cease-fire agreement. The tunnels, of which Israel says four have been found, cross the border between Israel and Lebanon.
UNIFIL began investigating the tunnels after Israeli troops uncovered the work in a recent operation. Israel has said Hezbollah dug the tunnels so as to be able to enter Israel and carry out attacks. Hezbollah has not commented on the operation.
"This is a matter of serious concern and UNIFIL technical investigations continue," the peacekeeping force said in a statement.
UNIFIL said two of the tunnels cross the so-called Blue Line that demarcates the border between Israel and Lebanon. Lebanese authorities have been called upon to take urgent follow-up action.
Israel and Lebanon are still technically at war, after Israel and Hezbollah fought a month-long war that ended in stalemate in 2006. Lebanon's President Michel Aoun said his government would take action after receiving a full report from the peacekeeping force.
According to AP, Prime Minister-designate Saad Hariri has said Lebanon remains committed to the full implementation of the cease-fire agreement and will respect the Blue Line.