A Sunni Islamist group claims responsibility for a suicide bombing in Beirut . The group , ISIS , says it 's the `` first small payment '' in a bigger push against Hezbollah . " This is not an isolated incident. CNN 's Mohammed Jamjoom contributed to this report . Lebanon has seen a surge in violence as tensions are exacerbated by Syria 's civil war .
A Sunni Islamist group claims responsibility for a suicide bombing in Beirut . The group , ISIS , says it 's the `` first small payment '' in a bigger push against Hezbollah . " This is not an isolated incident. Lebanon has seen a surge in violence as tensions are exacerbated by Syria 's civil war .