The US representative to the UN has warned that America may take further action after bombarding a Syrian air base suspected of using chemical weapons.
Nikki Haley said her country would not stand by when chemical weapons were used, as it was in its "vital interest" to stop their proliferation.
Syrian ally Russia accused the US of encouraging "terrorists" with its unilateral actions.
Moscow has promised to strengthen Syria's anti‑aircraft defences.
It is also closing down a hotline with the US designed to avoid collisions between their air forces over Syria.
At least six people are reported to have been killed in the US missile strikes yesterday.
US officials told the BBC the base was used to launch a chemical weapons attack that killed dozens of civilians on Wednesday.
