Russian PM Dmitry Medvedev denounced Donald Trump for attacking 'the legitimate government of Syria' and for allegedly breaking international law without the approval of the UN. The US President warned he would do it again after unleashing a surprise attack on the Syrian regime with a massive show of firepower. In the first direct American raid on Bashar al Assad's forces, Mr Trump authorised the firing of 59 cruise missiles at a military airfield. Officials said it was retaliation for Assad's use of chemical weapons and would 'deter' further atrocities. The US ambassador to the UN, Nikki Haley, said that her country had taken 'a very measured step'. She added: 'We are prepared to do more but we hope that will not be necessary.'