A Russian court said on Tuesday it had imposed restrictions on jailed Kremlin critic Alexei Navalny's Anti-Corruption Foundation (FBK), while it considers a legal request to ban it and his regional campaign offices.

Moscow City Court is considering a request from the Moscow prosecutor to officially outlaw the FBK on the grounds that it is an extremist group.

The court announced a "ban on certain actions" for the FBK, but provided no further details.