ATLANTA (AP) - Atlanta's police chief says 21 people have been arrested during marches to protest the Ferguson, Missouri, grand jury decision not to indict an officer in the fatal shooting of an unarmed 18-year-old.

Chief George N. Turner said late Tuesday that most of the arrests are for failure to disperse when asked, but one person faces a weapons charge.

A large group of students walked from Morehouse College to the CNN Center in downtown Atlanta, peacefully chanting, singing and waving signs and later moved to Underground Atlanta.

But as the night wore on, some groups split off and tried to block the interstate and the chief said some windows were broken in buildings along Peachtree Street.

He says windows of a patrol car and a taxi also were broken.

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