UN rights chief Michelle Bachelet voiced her concerns about the political turmoil in Tunisia in a phone call with the foreign minister, and offered her assistance if required, a spokeswoman said on Tuesday. The AFP news agency reports that Tunisia has often been praised as a rare success story for its democratic transition after the Arab Spring regional uprisings sparked by its 2011 revolution. But many Tunisians are angered at a political class seen as obsessed with power struggles and disconnected from the suffering of the poor, amid high unemployment and spiralling prices.