Tunisian police have shot dead at least two people during a protest in the north-western town of Kef.
Officers opened fire after a crowd attacked and burned a police station, demanding the resignation of the police chief they accused of abuse of power.
Unconfirmed reports say another two people died on the way to hospital.
The deaths came as a nationwide night-time curfew, imposed during the unrest which ousted President Zine el-Abidine Ben Ali, was shortened by two hours.
The protests are widely seen as a having inspired the current turmoil in Egypt and demonstrations in other countries in the region.
Hundreds of people gathered in front of the Kef police station on Saturday.
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