The US Secretary of State has claimed to have seen "raw data" suggesting that Assad's regime has used chlorine gas in attacks in rebel-held regions of Syria, according to Reuters. Although he also said that the data hadn't yet been fully verified.
Kerry, speaking in London, said the United States had agreed with its allies to ramp up support for the Syrian opposition but declined to say whether that would include arming them.
More top news
The violence began after a counter-protester allegedly doused a female rally organiser with pepper spray.
As temperatures climb through the day, the warmest spots are likely to be across western parts of Northern Ireland and western Scotland.
Boris Johnson and Amber Rudd have both criticised social media giants for failing to detect and remove extremist material online.