Tags: Darren Wilson

Missouri's governor ordered hundreds more National Guard troops on Tuesday to the St. Louis suburb rocked by rioting after a white policeman was cleared in the fatal shooting of an unarmed black teenager, while the local mayor said the governor did not do enough to protect businesses from looting.

A Missouri grand jury voted not to charge a white police officer for the fatal August shooting of an unarmed black teenager, an incident that set off weeks of sometimes violent protests around the St. Louis area, a county prosecutor said on Monday.

Police in Ferguson, Missouri, kept alert on Thursday for signs of tension after arresting five people for blocking a street the night before in a protest demanding the criminal indictment of a white police officer who shot dead an unarmed black teenager in August.