Thousands of protesters, angered at the killing of opposition politician Chokri Belaid, gathered across Tunisia today.
Despite calls for calm from the authorities, 8,000 protesters massed outside the Interior Ministry in Tunis calling for the fall of the government, while thousands more demonstrated in cities including Mahdia, Sousse, Monastir and Sidi Bouzid.
There were reports that Tunisian police fired teargas to disperse protesters demonstrating in the capital.
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Two knives were found at the scene in Islington, North London, and the suspects fled on foot before being arrested.
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.