Moscow authorities vow tough action against any new protest

Authorities in Moscow are warning that a planned attempt to hold an unauthorized protest on Saturday will bring a strong police response

MOSCOW -- Authorities in Moscow are warning that a planned attempt to hold an unauthorized protest on Saturday will bring a strong police response.

Despite the violence, activists have called for a march through central Moscow on Saturday.

The city prosecutor's office on Friday issued a statement warning that the attempt would be "a direct violation of the law. Law enforcement agencies will be forced to take all necessary measures to curb provocations."