Several protesters taken into custody in Ferguson

FERGUSON, Missouri (AP) — Several protesters have been taken into custody during a demonstration in Ferguson outside of the police department.

Tensions escalated late Friday during an initially calm demonstration after police said protesters were illegally blocking an avenue.

The exact number of arrests was not immediately clear, and spokesmen for the Ferguson Police Department and St. Louis County Police could not immediately be reached.

The demonstration in Ferguson came after protesters earlier in the day temporarily shut down three large malls in suburban St. Louis.

Protests have been ongoing for days in Ferguson after a grand jury's recent decision not to indict the white police officer who fatally shot black 18-year-old Michael Brown.

Chicago, New York, Seattle and northern California also saw demonstrations Friday.