Four Tunisian police killed by suicide bomb blast - government

TUNIS (Reuters) - Four Tunisian policemen were killed on Wednesday when an Islamist militant detonated his explosive belt during a security forces raid on a house in the south of the country, the Interior Ministry said. Another militant was shot by police during the raid in Tataouine, it said. (Reporting by Tarek Amara; writing by Patrick Markey; Editing by Janet Lawrence)