BEIRUT - Lebanese militant group Hezbollah fired rockets and mortars at what it said were Islamic State fighters in the north of the country on Friday, killing five of them, a security source said. Sunni Islamists have regularly infiltrated Lebanon's border with Syria in the north during its neighbor's four-year-old civil war, clashing with both Shi'ite Hezbollah and the Lebanese army. The Shi'ite movement's al-Manar TV also reported the incident, which took place in the northern Bekaa Valley. It was not followed by further violence, the security source said.
