Twin explosions in the Lebanese capital of Beirut killed at least 37 people and injured 181.
The attack took place in southern Beirut, an area dominated by the Shia Hezbollah militant group.
Hezbollah has been instrumental in helping the Syrian regime combat rebels in Syria.
That includes groups like ISIS and Jabhat al-Nusra.
This is the worst attack in Lebanon since a 2013 mosque bombing killed 42 and injured hundreds.
