President Barack Obama says the elimination of Syria’s declared chemical weapons stockpile marks an important achievement in the effort to counter the spread of weapons of mass destruction.

But while hailing that achievement, Obama says Syria now must follow through on its commitment to destroy its remaining declared chemical weapons production facilities.

In a written statement, Obama also says concerns about omissions and discrepancies in Syria’s declaration to the organization that oversaw the destruction must be addressed.

Syria agreed to give up its chemical arsenal last fall when Obama threatened missile strikes in retaliation for a chemical attack on a rebel-held suburb of Damascus. The attack is believed to have killed more than 1,000 people.

The weapons were destroyed aboard the U.S. cargo vessel MV Cape Ray in international waters.

(AP)