Uzumcu says a 13th consignment of chemicals was shipped out of Latakia port Monday, bringing to over 65 percent the amount of Syria's internationally declared stockpile removed from the war-torn country.

He says "the frequency and volumes of deliveries have to increase significantly" to get Syria back on track to have its entire stockpile destroyed by June 30.

The chief of the international chemical weapons watchdog has also said that Syria has to ratchet up its movement of raw materials for poison gas and nerve agents if it is to meet deadlines for destroying the stockpile.

In a monthly report to the UN Security Council, the OPCW said that the Syrian authorities told the team overseeing the destruction of its arsenal that the attempted attacks took place on January 27.

Once all the chemicals are delivered, they will be taken to a US vessel called the MV Cape Ray and will be broken down at sea using hydrolysis, a process which is expected to take 90 days.

On September 14, 2013, Russia and the United States agreed on a deal under which Syria would have its chemical weapons eliminated.

The deal averted a controversial US decision to bomb Syria over an August 21 chemical attack which the Syrian government said was a false-flag operation by anti-Syria militants. The US supported militants' claims which accused the government for the attack.

NTJ/SHI