Opposition organizations plan to hold a rally at 2 p.m. in Moscow on January 26 to demand an investigation into the Other Russia activist Alexander Dolmatov's suicide in the Netherlands.
The idea was proposed by Left Front coordinator Sergei Udaltsov at the first session of the Opposition Coordinating Council (KSO) in Moscow on Sunday.
The proposals was backed in a majority vote. The format of the rally is to be announced within days.
Udaltsov told Interfax that solo pickets could be staged outside the presidential administration headquarters, or a rally could be held and a letter passed to the presidential administration - formats that do not require an official permit, especially now that so little time has remained.
The KSO urged the Netherlands on Saturday to inquire into Dolmatov's suicide.
Russia has already demanded that the Dutch government urgently investigate Dolmatov's death.
"The moment the news arrived, the Russian Embassy urged the Dutch authorities to launch an urgent and exhaustive inquiry," the Russian Foreign Ministry said on its website on Friday.
Dolmatov was a leading designer of a Russian defense company and a suspect in the Bolotnaya Square case. He left for Holland where he applied for political asylum. It emerged on Thursday that he committed suicide after the Dutch authorities denied political asylum to him.