BEIRUT , Lebanon ( CNN ) -- A crowd in southern Lebanon threw rocks at U.N. peacekeepers over the weekend , wounding 14 of them in an effort to prevent the investigation of an explosion in the area , the United Nations said . U.N. peacekeepers were investigating reports of an explosion in a Hezbollah stronghold . The troops with the United Nations Interim Force in Lebanon ( UNIFIL ) were lightly wounded , and some vehicles were damaged including a UNIFIL ambulance , officials said . The explosion took place Tuesday in Khirbet Salim , in what Lebanese authorities said was an uninhabited house . Ammunition stored there caused the blast due to the high temperature and humidity , Lebanese officials said . The region is a stronghold for Hezbollah , the Lebanese militant group and political party that fought a war with Israel in 2006 . Hezbollah has carried out attacks against civilians , and the United States and Israel list the group as a terrorist organization . Hezbollah officials had no comment Monday . UNIFIL called last week 's explosion `` a serious violation of Security Council resolution 1701 , '' which was aimed at ending the 2006 conflict , `` notably the provision that there should be no presence of unauthorized assets or weapons in the area of operation between the Litani River and the Blue Line . '' Israel said the blast indicated that Hezbollah continued to store weapons near the Israeli border . Israeli Ambassador Gabriela Shalev argued that the Lebanese Army had assisted Hezbollah in preventing U.N. personnel from investigating the scene . UNIFIL , in a statement Monday , said it was conducting a joint investigation with the Lebanese military . When troops Saturday night arrived `` at a location 1 km from the site in order to verify elements related to the explosion , approximately 100 persons gathered and attempted to hamper the activity . `` The amassed population threw stones and confronted the UNIFIL personnel on the ground . As the gathering grew both UNIFIL and LAF deployed additional personnel on the ground in order to contain the situation and prevent any further escalation . `` As UNIFIL troops were leaving the area , one patrol , surrounded by a group of persons , fired warning shots in the air to clear its exit path . '' During the incident , the 14 peacekeepers were injured and the vehicles were damaged , the UNIFIL statement said . CNN 's Cal Perry and Kevin Flower contributed to this report .
Crowd in southern Lebanon throw rocks at U.N. peacekeepers injuring 14 . Peacekeepers were trying to check an explosion in the area . Ammunition stored in house caused blast due to temperature and humidity .