The US says it would be prepared to strike Syrian government forces again - but hopes it's not necessary.

Britain has welcomed the retaliation for a chemical weapons attack this week which left at least 80 people dead.

The American ambassador to the UN, Nikki Haley, told the Security Council they attacks are justified:

But Russia has condemned the missile launches as illegitimate.

Speaking through a translator, Russia's deputy ambassador Vladimir Safronkov warned the US against any further attacks: