At least two people have been killed in fresh unrest over unemployment in Tunisia, officials say. The interior ministry said in a statement that eight people had been wounded during a demonstration in the western town of Thala. Union officials have said up to five people were killed. "The police opened fire in legitimate self-defence," the statement said, adding three police officers had also been wounded "seriously". The protests erupted last month over a lack of freedom and jobs. A hospital source in Thala, located about 200 km (125 miles) south-west of the capital Tunis, said that several people had been admitted to the hospital after the latest clashes.