The UK foreign secretary has called off a visit to Moscow in the wake of the Syrian chemical weapons attack.

According to BBC News
Boris Johnson, who had been due to travel on Monday, said the situation had changed "fundamentally" and his priority was to build international support for a ceasefire.

He said the UK called on Russia to do everything possible to bring about a "political settlement in Syria".
"We deplore Russia's continued defence of the Assad regime," he added.
The US Secretary of State Rex Tillerson will visit Moscow as planned after the G7 meeting on 10-11 April.
Mr Johnson said he was in contact with the US and others in the run-up to the meeting, to build "coordinated international support for a ceasefire".
He said he was working to bring together other "like-minded partners" to "explore next steps".
After the G7 meeting between the world's leading seven industrialised nations Mr Tillerson would be able to deliver a "clear and co-ordinated message to the Russians", he said.
The foreign secretary called on Russia to work with the rest of the international community to
"ensure the shocking events of the last week are never repeated".