At a similar protest a week earlier, police detained more than 1,300 in one of the biggest security operations of recent years that brought wide worldwide condemnation.
Police reportedly used megaphones to urge protesters at the Pushkinskaya, one of Moscow's busiest squares, to refrain from violating public order and blocking passage for other people.
He emphasized that Russian Federation must observe its worldwide human rights obligations, unjustified violence against innocent people must be stopped and those detained should be released.
It said Germany "expects the swift release of all peaceful protesters" and the inclusion of independent candidates who meet all legal requirements in the Moscow election.
"I just want to live in a normal country", said Sergei Nikforov, 22, a student from Moscow, who was attending his second protest. A previous demonstration a week ago over the candidates' exclusion from the September 8 local vote resulted in almost 1,400 arrests. The excluded candidates say that is a lie and insist on taking part in a contest they believe they could win.
Authorities say opposition candidates failed to collect enough genuine signatures to register.
The council, controlled by the pro-Kremlin United Russia party, is responsible for a large municipal budget. All of its 45 seats, which carry five-year terms, are up for re-election on September 8. The police had warned about the risks of various provocations at the unauthorized rally on August 3 and called on citizens and guests of the capital to avoid participation in it.
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OVD-info said he was bundled into a van before being taken out, smacked in the kidneys and forced into another van. In detention, protesters were denied food, water, and access to doctors and lawyers.
On Saturday, about 2,000 people attended another rally in St. Petersburg supporting the Moscow protests, the local news site Fontanka.ru reported.
Several would-be candidates to the Moscow City Duma have faced harassment ahead of the Moscow rally, including arrests and home searches. Police this week charged half a dozen people with organizing and participating in "mass disorders", a serious charge that potentially carries years in jail.
Opposition politician Aleksei Navalny and at least seven of his allies are in jail for breaking tough protest laws.
Russian investigators on Saturday alleged that a civic group led by opposition leader Alexei Navalny was involved in money laundering. Navalny was jailed for a 30-day term last month.
The Foreign Ministry said Sunday that "the arrests are not in proportion to the peaceful character of the protests, which were directed against the exclusion of candidates" from the city council election in Moscow.
Reports said that the head of Moscow police even petitioned the Russian Premier League to reschedule a match between the city's two top teams, which may trigger fan violence and require a massive presence of the force in two places at once.