In Mogadishu, Somalia. From the BBC:

Thousands of people rioted, burning tires and throwing stones after traders refused to accept local notes and demanded US dollars instead.

The recent printing of local shilling notes on illegal presses has led to spiralling inflation, reporters say. This and the increasing insecurity have seen food prices double.
The United Nations reports that soaring food prices have already forced more than a third of all Somalis to rely on outside assistance to feed their families.