Rocket fired from Lebanon towards Israel The news agency said the rocket was fired from a location near the southern town of Marjayoun, about six miles north of the Israeli border. It was not immediately clear who fired the rocket or whether it caused any damage or casualties. An explosion was heard. Soldiers are searching the area. The cause is still being investigated," an Israeli military spokesman said. A second Israeli military source said the explosion was probably caused by a mortar. The incident came amid heightened tensions in the region over Syria's civil war. Damascus has said it will respond to Israeli air strikes earlier this month against suspected Iranian missiles in Syria destined for the Lebanese militant group Hezbollah. In addition to Hezbollah, militant Palestinian groups are also known to operate in south Lebanon. Earlier on Sunday, two rockets hit Hezbollah strongholds in south Beirut, tearing through an apartment and car dealership, wounding four Syrian workers. There was no claim of responsibility, but the attack was widely portrayed as retaliation for Hezbollah chief Hassan Nasrallah's pledge that the Shia militia would fight alongside Syrian President Bashar Assad's forces until victory over Syrian rebels.