In St. Petersburg on Palace Square, where today an inconsistent action was held for free Internet, the volunteer of the election headquarters of Alexei Navalny Andrei Chernov was detained. The OVD-Info was told about this at the headquarters.

Chernov was delivered to the police department.
In St. Petersburg, no one else was detained. But in Moscow, where the action was agreed, 17 people were detained.
UPD. Chernov was released without drawing up an administrative protocol.