It was passed unanimously by all 15 member states.
Syrian President Bashar al-Assad agreed to destroy its declared chemical weapons stock in 2013 after facing mounting pressure from both the U.S. and Russia. (Video via Presidency of the Syrian Arab Republic, U.S. Navy / Petty Officer 1st Class Isaiah Sellers III)
But there's been evidence of chlorine attacks since then.
No one has been officially blamed for the attacks yet.
The U.S. has pinned the latest attacks on the Damascus, while others have been more hesitant to point any fingers.
This newly adopted UNSC measure will form a panel to figure out who's repsonsible.