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U.S. Secretary of State Rex Tillerson, left, shakes hands with French Foreign Affairs Minister Jean-Yves Le Drian before a meeting in Paris, Tuesday Jan. 23, 2018. Tillerson holds talks on the war in Syria and other regional issues with Le Drian. (Christian Hartmann, Pool via AP)
- Christian Hartmann
U.S. Secretary of State Rex Tillerson, second right, and French Foreign Affairs Minister Jean-Yves Le Drian, second left, meet in Paris, Tuesday Jan. 23, 2018. Tillerson holds talks on the war in Syria and other regional issues with Le Drian. (Christian Hartmann, Pool via AP)
- Christian Hartmann
U.S. Secretary of State Rex Tillerson leaves a foreign ministers' meeting on the International Partnership against Impunity for the Use of Chemical Weapons, in Paris, Tuesday, Jan. 23, 2018. The United States and 28 other countries are launching a new plan to better identify and punish anyone who uses chemical weapons, amid new reports of a suspected chemical attack in Syria. (AP Photo/Thibault Camus)
- Thibault Camus
U.S. Secretary of State Rex Tillerson, left, and French Foreign Minister Jean-Yves Le Drian, pose for a photo during a foreign ministers' meeting on the International Partnership against Impunity for the Use of Chemical Weapons, in Paris, Tuesday, Jan. 23, 2018. The United States and 28 other countries are launching a new plan to better identify and punish anyone who uses chemical weapons, amid new reports of a suspected chemical attack in Syria. (AP Photo/Thibault Camus)
- Thibault Camus
U.S. Secretary of State Rex Tillerson leaves a foreign ministers' meeting on the International Partnership against Impunity for the Use of Chemical Weapons, in Paris, Tuesday, Jan. 23, 2018. The United States and 28 other countries are launching a new plan to better identify and punish anyone who uses chemical weapons, amid new reports of a suspected chemical attack in Syria. (AP Photo/Thibault Camus)
- Thibault Camus
French Foreign Affairs Minister Jean-Yves Le Drian, left, and U.S. Secretary of State Rex Tillerson, right, vote during a foreign ministers' meeting on the International Partnership against Impunity for the Use of Chemical Weapons, in Paris, Tuesday, Jan. 23, 2018. The United States and 28 other countries are launching a new plan to better identify and punish anyone who uses chemical weapons, amid new reports of a suspected chemical attack in Syria. (AP Photo/Thibault Camus)
- Thibault Camus
U.S. Secretary of State Rex Tillerson delivers a speech during a foreign ministers' meeting on the International Partnership against Impunity for the Use of Chemical Weapons, in Paris, Tuesday, Jan. 23, 2018. The United States and 28 other countries are launching a new plan to better identify and punish anyone who uses chemical weapons, amid new reports of a suspected chemical attack in Syria. (AP Photo/Thibault Camus)
- Thibault Camus
U.S. Secretary of State Rex Tillerson, left, and French Foreign Minister Jean-Yves Le Drian, arrive to pose for a photo during a foreign ministers' meeting on the International Partnership against Impunity for the Use of Chemical Weapons, in Paris, Tuesday, Jan. 23, 2018. The United States and 28 other countries are launching a new plan to better identify and punish anyone who uses chemical weapons, amid new reports of a suspected chemical attack in Syria. (AP Photo/Thibault Camus)
- Thibault Camus
U.S. Secretary of State Rex Tillerson delivers a speech during a foreign ministers' meeting on the International Partnership against Impunity for the Use of Chemical Weapons, in Paris, Tuesday, Jan. 23, 2018. The United States and 28 other countries are launching a new plan to better identify and punish anyone who uses chemical weapons, amid new reports of a suspected chemical attack in Syria. (AP Photo/Thibault Camus)
- Thibault Camus
U.S. Secretary of State Rex Tillerson, right, listens to French Foreign Affairs Minister Jean-Yves Le Drian as they walk together before a meeting in Paris, Tuesday Jan. 23, 2018. Tillerson holds talks on the war in Syria and other regional issues with Le Drian. (Christian Hartmann, Pool via AP)
- Christian Hartmann
U.S. Secretary of State Rex Tillerson, right, smiles as he poses with Foreign ministers for a photo during a foreign ministers' meeting on the International Partnership against Impunity for the Use of Chemical Weapons, in Paris, Tuesday, Jan. 23, 2018. The United States and 28 other countries are launching a new plan to better identify and punish anyone who uses chemical weapons, amid new reports of a suspected chemical attack in Syria. (AP Photo/Thibault Camus)
- Thibault Camus
US: Russia ultimately to blame for Syrian chemical attacks
- By MATTHEW LEE and ANGELA CHARLTON Associated Press
- Updated