Tunisia was rocked by a fourth night of street clashes between riot police and youths in mostly working-class neighbourhoods, and there were calls on social media for more rallies today. The French Preee Agency (AFP) reports that more than 600 people had been arrested by Monday over the disturbances. The social unrest comes at a time of economic crisis, worsened by the impact of the Covid-19 pandemic on the tourism-reliant North African country, that has deepened poverty and driven up inflation and unemployment.