This group is a Shia Islamist political party known for supporting, and fighting alongside President Bashar al-Assad in Syria's civil war; leading people to believe that the bombing was intentional, and intending to relay a message to those it targeted.
Beginning in March 2013, Syrian aircraft fire rockets into northern Lebanon after warning Beirut to no longer allow their militant groups to cross the border to fight the war in Syria.
Hezbollah was declared a terrorist organization in 2013 by the European Union, and was separated from the Lebanese government, making them an independent militia fighting on behalf of Iran rather than the country of Lebanon.
This attack to their territory caused many angry, and grieving Shiite Muslims to place blame on the Lebanese or Syrian militants who are in support of the Sunni-led uprising in the neighboring country of Syria.
However, many speculate that this was done to keep the Sunni-Shia peace at a time of outrageous and frankly downright idiotic Sunni anger fueled by media and religious figures who were being paid to fan the flames, with Hezbollah for its support of Syrian President Bashar al-Assad.
Hezbollah supporters flood the streets and began chanting, booing, and charging the vehicle of Marwan Charbel, Lebanon's interior ministers who was accused for the lack of security preparation.