Authorities arrested three protesters during a third straight night of unrest in the St. Louis suburb of Ferguson as tensions mount amid speculation that a grand jury could decide soon whether to indict the white police officer who killed an unarmed black 18-year-old. AP cited St. Louis County police saying that large groups of protesters blocked traffic three times in Ferguson on Friday night. That happened twice near the police station and once on West Florissant Avenue, the site of violent protests soon after the Aug. 9 killing of Michael Brown. A motorist lost control and crashed into a light pole during the unrest on West Florissant. Protesters converged on the car, but no one was hurt. -- SPA 20:37 LOCAL TIME 17:37 GMT تغريد